CBSE Class 10 Science Biology Life Process Respiration Assignment

Read and download free pdf of CBSE Class 10 Science Biology Life Process Respiration Assignment. Get printable school Assignments for Class 10 Biology. Class 10 students should practise questions and answers given here for Chapter 6 Life Processes Biology in Class 10 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 10 Biology prepared as per the latest books and syllabus issued by NCERT, CBSE, KVS and do problems daily to score better marks in tests and examinations

Assignment for Class 10 Biology Chapter 6 Life Processes

Class 10 Biology students should refer to the following printable assignment in Pdf for Chapter 6 Life Processes in Class 10. This test paper with questions and answers for Class 10 Biology will be very useful for exams and help you to score good marks

Chapter 6 Life Processes Class 10 Biology Assignment

MULTIPLE CHOICE QUESTIONS

Question. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
(a) cytoplasm.
(b) mitochondria.
(c) chloroplast.
(d) nucleus.
Answer : B

Question. During cellular respiration one molecule of glucose is first broken down into two molecules of
(a) Acetic acid
(b) Pyruvic acid
(c) Lactic acid
(d) None of the above
Answer : B

Question. Which of the following statements about the autotrophs is incorrect?
(a) They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll
(b) They store carbohydrates in the form of starch
(c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight
(d) They constitute the first trophic level in food chains
Answer : C

Question. Choose the function of the pancreatic juice from the following
(a) trypsin digests proteins and lipase carbohydrates
(b) trypsin digests emulsified fats and lipase proteins
(c) trypsin and lipase digest fats
(d) trypsin digests proteins and lipase emulsified fats
Answer : D

Question. Choose the correct path of urine in our body
(a) kidney →ureter →urethra →urinary bladder
(b) kidney →urinary bladder →urethra →ureter
(c) kidney →ureters →urinary bladder →urethra
(d) urinary bladder →kidney →ureter →urethra
Answer : B

Question.The parts shown as A and B in the given diagram are

CBSE Class 10 Science Biology Life Process

The parts shown as A and B in the given diagram are
(a) A is epidermal cell, B is stomatal pore
(b) A is guard cell, B is stomatal pore
(c) A is epidermal cell, B is guard cell
(d) A is guard cells, B is epidermal cell
Answer : B

Question. In normal expiration, the diaphragm is
(a) Arched
(b) Flattened
(c) Perforated
(d) None of these
Answer : A

Question. Villi present on the inner lining of the intestinal wall
(a) Secretes enzymes for digestion
(b) Secretes hormones
(c) Decreases the surface area for absorption
(d) Increases the surface area for absorption
Answer : D

Question. The correct pathway of blood in circulatory system is
(a) atria → ventricles → arteries → veins
(b) ventricles → atria → veins → arteries
(c) ventricles → veins → arteries → atria
(d) veins → ventricles → atria → arteries
Answer : A

Question. Respiration is a process in which
(a) Energy is stored in the form of ADP
(b) Energy is released and stored in the form of ATP
(c) Energy is used up
(d) Energy is not released at all.
Answer : B

Question. Full form of ATP?
(a) Adenosine Triphosphate
(b) Adenosine Tetraphosphate
(c) Adenine Triphosphate
(d) Adinosine Tripolymer
Answer : A

Question. The xylem in plants are responsible for
(a) transport of water.
(b) transport of food.
(c) transport of amino acids.
(d) transport of oxygen
Answer : A

Question. Why blood is red?
(a) due to presence of oxygen
(b) due to presence of haemoglobin
(c) due to presence of CO2
(d) due to presence of WBC
Answer : B

Question. If kidney fails to reabsorb water, the tissues would
(a) remain unaffected
(b) shrink to shrivel
(c) absorb water from blood
(d) take more oxygen from blood
Answer : B

Question. The autropic mode of nutrition requires
(a) carbon dioxide and water.
(b) chlorophyll.
(c) sunlight.
(d) all of the above
Answer : D

Question. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
(a) cytoplasm.
(b) mitochondria.
(c) chloroplast.
(d) nucleus.
Answer : B

Question. Chyme is ____.
(a) Digestive enzyme secreted by stomach.
(b) Hormone secreted by islets of Pancreas
(c) food which enters into intestine from stomach.
(d) Part of bile juice which stores in gall bladder
Answer : B

Question. Haemoglobin is a type of
(a) Carbohydrate
(b) Skin Pigment
(c) Vitamin
(d) Respiratory Pigment
Answer : D

Question. Which is the correct sequence of parts in human alimentary canal?
(a) Mouth →stomach →small intestine →oesophagus →large intestine
(b) Mouth →oesophagus →stomach →large intestine →small intestine
(c) Mouth →stomach →oesophagus →small intestine →large intestine
(d) Mouth →oesophagus →stomach →small intestine →large intestine
Answer : D

Question. The inner lining of stomach is protected by one of the following from hydrochloric acid. Choose the correct one
(a) Pepsin
(b) Mucus
(c) Salivary amylase
(d) Bile
Answer : B

 

ASSERTION AND REASON QUESTIONS

Following questions consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Question. Assertion (A): Diffusion does not meet high energy requirements of multi-cellular organisms
Reason (R) : Diffusion is a fast process but occurs at the surface of the body.
Answer : C

Question. Assertion (A): The purpose of making urine is to filter out undigested food from intestine
Reason (R): Kidneys filter the waste and produce urine,
Answer : D

Question. Assertion (A): The inner lining of the small intestine has numerous finger-like projections called villi.
Reason (R) : The villi increase the surface area for absorption.
Answer : A

Question. Assertion (A) : Photosynthesis takes place in green parts of the plants.
Reason (R) : Photosynthesis always takes place in leaves.
Answer : C

Question. Assertion (A) : Ureters are the tubes which carry urine from kidneys to the bladder.
Reason (R): Urine is stored in the urethra.
Answer : C

Question. Pancreatic juice contains more than one enzyme. Which among the following combination is correct? 
(a) Pepsin and Lipase
(b) Amylase and Pepsin
(c) Pepsin and Trypsin
(d) Trypsin and Lipase
Answer : D

Question. Which one of the following organisms respires through the skin? 
(a) Blue whale
(b) Salamander
(c) Platypus
(d) Peacock
Answer : B

Question. The first enzyme that the food encounters in human digestive system is : 
(a) Pepsin
(b) Trypsin
(c) Chymotrypsin
(d) Amylase
Answer : D

Question. Red blood corpuscles are formed in 
(a) Liver
(b) Kidneys
(c) Small intestine
(d) Bone marrow
Answer : D

Question. The Excretory units of Annelids are: 
(a) Uniferous tubule
(b) Flame cells
(c) Nephridia
(d) Malpighian tubule
Answer : C

Question. Open circulatory system is found in: 
(a) Prawn
(b) Snakes
(c) Fish
(d) Man
Answer : A

Question. Haemoglobin is dissolved in Plasma of blood in: 
(a) Earthworm
(b) Roundworm
(c) Tapeworm
(d) Insects
Answer : A

Question. Which one of the following organisms has a cellular respiratory pigment dissolved in plasma and is also a predaceous carnivore and shows matriphagy? 
(a) Scorpion
(b) Cockroach
(c) Earthworm
(d) Sea cucumber
Answer : A

Question. Glucose is the prime source of energy in our body. However, it is stored in the form of glycogen in the muscle and liver of animals and in the form of starch in plants. As a result, everytime a cell requires glucose, it must hydrolyze glycogen which is an energy consuming process. Why does the cell store glycogen instead of glucose in free form? 
(a) Glycogen is more compact and more hydrophilic.
(b) Storage of glucose in free form will consume more ATP.
(c) Glucose in the free form creates more osmotic pressure.
(d) Glucose is highly reactive molecule hence storing in the free form can result in unwanted reactions in the cells.
Answer : C

Question. A squirrel was eating a fruit on the ground. Suddenly, it was attacked by a dog. The squirrel rushed to the tree immediately and saved itself from the dangerous attack. What immediate changes are most likely to have taken place in the body of the squirrel? 
A. Blood flows to the stomach for rapid digestion.
B. Adrenaline was secreted in the blood by the adrenal glands.
C. Heart beat becomes faster and pumps more blood so that muscles get more oxygen.
D. Adrenocorticotropic hormone is secreted in the blood and blood flows more towards the vital organs.
Select the correct combination of options given below:
(a) A and B
(b) A and C
(c) B and C
(d) C and D
Answer : C

Question. Removal of the pancreas impairs the breakdown of 
(a) lipids and carbohydrates only
(b) lipids and proteins only
(c) lipids, proteins and carbohydrates
(d) proteins and carbohydrates only
Answer : C

Question. Microscopic examination of a blood smear reveals an abnormal increase in the number of granular cells with multiple nuclear lobes. Which one of the following cell Types has increased in number? 
(a) Lymphocytes
(b) Monocytes
(c) Neutrophils
(d) Thrombocytes
Answer : C

Question. Which one of the following metabolic conversions requires oxygen? 
(a) Glucose to pyruvate
(b) Glucose to CO2 and ethanol
(c) Glucose to lactate
(d) Glucose to CO2 and H2O
Answer : D

Question. Which one of the following organs is NOT a site for the production of white blood cells? 
(a) Bone marrow
(b) Kidney
(c) Liver
(d) Spleen
Answer : B

Question. Which of the following process occur only in animals? 
(a) Respiration
(b) Nutrition
(c) Nervous control
(d) Hormonal control
Answer : C

Question. Tricuspid valve is present in 
(a) Right atria and right ventricle
(b) Left atria and left ventricle
(c) Wall of atrium
(d) Wall of vetricle
Answer : A

Question. Root pressure is effective way transporting water in xylem. This pressure is generated 
(a) In bright sunlight
(b) During night
(c) At very low temperature
(d) In high trees
Answer : B

Question : Instant source of energy is ___________.
a. Sucrose
b. Fats
c. Glucose
d. Amino acids
Answer : C
1. c. Glucose
Explanation: Glucose is simple sugar which is formed when carbohydrate get broken. Also, the carbohydrates get digested into glucose. Since, glucose does not have to be digested, it acts as an instant source of energy
 
 
Question : Out of the four experimental set-up shown below, which one will demonstrate the evolution of carbon dioxide during respiration of germinating seeds ? 
S-
a. III
b. II
c. IV
d. I
Answer : C 
Explanation: Presence of KOH solution, germinating seeds and rubber cork in conical flask and water in beaker.
 
 
Question : To prepare a good temporary mount of the petunia leaf peel showing many stomata, the student has to get the peel from the 
1. lower surface of the leaf
2. tip of the leaf
3. point of attachment of the leaf to its petiole.
4. upper surface of the leaf
Answer : A 
Explanation: Stomata are mainly present on the lower surface of the leaf.  
 

Question : How is opening and closing of stomata regulated?
Answer : The closing and openings of the stomata is regulated by guard cells. When the guard cells swell or turgid due to entry of water, the stomata are opened. The guard cells shrink due to loss of water the stomata get closed.

Question : Why are glomeruli considered as dialysis bags?
Answer : The main fimetion performed by the glomeruli is selective filtration. They filter small molecules containing glucose, salts, urea, and liquid senim. Etc. The large molecules such as proteins remain in blood. Thus, glomenili of the kidneys function as dialysis bags.

Question : What is the role of saliva in the digestion of food?
Answer : The saliva contains an enzyme called salivary amylase that breaks down starch which is complex molecule into glucose.

Question : If you compare your rate of breathing by feeling your chest movement with the number of times a fish opens and closes its mouth. Which will be higher and way?
Answer : The number of times a fish opens and closes its mouth will be higher as the amount of dissolved oxygen in water is fairly low compared to the amount of oxygen in the air. Therefore, rate of breathing in aquatic organisms is much faster than in terrestrial organisms.

Question :  (i) Draw a well labeled diagram of human digestive system
(ii) Describe the role of following in digestion.
a) Bile
b) Salivary amylase
c) HCl

Answer : (i)a) Bile – emulsification of fats
b) Salivary amylase – digest starch in mouthc) HCl – Activate pepsinogen by making medium acidic in stomata.

Question : Mucus is not used for churning the food or digesting it. Then why is it secreted in the stomach?
Answer : Mucus is secreted in the stomach to protect its inner lining from being damaged by HCl. Excessive secretion of HCl can damage the lining and lead to peptic ulcer.

Question : What is common for cuscuta, ticks and leeches?
Answer : Cuscuta, ticks and leeches, all has parasitic mode of nutrition, they harm their host while taking nutrition.

Question : What is villi? What are its functions?
Answer : Finger like projection present in the inner lining of small intestine are called villi. They increase the surface area for the absorption of digested food in the small intestine.

Question : What is the role of glomerulus in kidney?
Answer : Glomerulus is a group of capillaries present in the cup like Bowman’s Capsule. It receives blood from renal artery which brings excretory wastes from body to the kidney. It filters water, salts, glucose, urea, the nitrogen containing end products of proteins and yellow bile compounds from the liver.

Question : What are the components of the gastric juice? What are their functions? 
Answer : Gastric juice contains three components: hydrochloric acid, enzyme pepsin and mucus. Their functions are:
1. Hydrochloric acid in the stomach is used to make the medium acidic to facilitate the action of the enzyme pepsin and to kill germs if any.
2. Enzyme pepsin digests proteins to convert them into peptones.
3. The mucus helps to protect the stomach wall from its own secretions of hydrochloric acid.  
 
 
Question : Only deoxygenated blood is pumped through a fish's heart. Is it true? Justify your answer. 
Answer : Yes, this statement is true, only deoxygenated blood is pumped in to fish's heart. The heart pumps out deoxygenated blood, which is oxygenated by the gills. It is then supplied to other body parts from where deoxygenated blood is returned to the heart and this is possible because fish have two chambered heart.

Question : What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?
Answer : Adaptation of terrestrial organism over aquatic organism for eficient uptake of oxygen from air –
(i) Increased respiratory surface area.
(ii) Very fine and delicate surface for easy exchange of oxygen and carbon – dioxide.
(iii) Placement of respiratory surface within the body for protection
(iv) Mechanism for moving the air in and out of respiratory surface where the oxygen is absorbed.

Question : Why is it essential to match the blood groups of donors and receiver person before arranging transfusion of blood?
Answer : RBC’s of blood carries antigen as well as antibody. If blood is not matched before transfusion then blood of receiver start producing antibodies against donor blood and destroys blood cells, this causes deficiency of blood and causes death.

Question : While eating you are advised not to talk. Why are you advised so?
Answer : We are advised so because while eating some food particles might enter the wind pipe which can lead to choking.

Question : If a person is working on a treadmill in a gymnasium, will it effect his rate of breathing? How?
Answer : Yes, it will affect his rate of breathing. The rate of breathing will become fast to supply more oxygen to meet the increased demand of energy.

Question : In the process of Photosynthesis food A is prepared which gets converted into food B. What are A and B? Why is A converted to B?
Answer : Food A is glucose and food B is Starch. A is converted to B as B is insoluble form of carbohydrate. It is more compact and hence, suitable for storage.

Question : What is excretion? How do unicellular organisms remove their wastes? 
Answer : The biological process which involves the removal of harmful metabolic wastes from the body is called excretion. Unicellular organisms remove wastes by simple diffusion through their body surfaces. Where as multicellular organism has various organs for excretion such as kidney. 
 
Question : In which cell organelle does respiration occur? 
Answer : Respiration occurs in the mitochondria of a cell. 

Question : If you compare your rate of breathing by feeling your chest movement with the number of times a fish opens and closes its mouth. Which will be higher and why?
Answer : The number of times a fish opens and closes its mouth will be higher as the amount of dissolved oxygen in water is fairly low compared to the amount of oxygen in the air. Therefore, rate of breathing in aquatic organisms is much faster than in terrestrial organisms.

Question : When we are asleep we are not performing any activity still our life processes are going on. Why?
Answer :“The maintenance functions of living organisms must go on even when they are not doing anything particular.” That is why the life processes are going on even while we are asleep or not performing any activity.

Question : We say that movement is a characteristic of living organisms but we always don’t see visible movements in plants. Comment.
Answer : We always don’t see visible movements in plants. It does not mean that they are not alive. Molecular movements take place in their body.

Question : Leaves of a healthy potted plant were coated with petroleum jelly. How will it affect the plant? State two reasons.
Answer :The plant will not remain healthy for long due to the following reasons:-

1.There will be no transpiration.
2. There will be no exchange of gases which will affect the rate of photosynthesis.

Question : What will be the outcome if a farmer foods his field everyday?
Answer : Respiration of plants will be affected because the oxygen present in the interspaces of the soil will be replaced by water.

Question : Name the areas in a woody stem through which respiratory exchange of gases take place.
Answer : In woody stem, the bark has lenticels for gaseous exchange.

Question : Autotrophs synthesis food for the living world. Justify this statement in one sentence only interconnecting autotrophs and heterotrophs.
Answer : The food producers are autotrophs and all the heterotrophs consume the food produced by the autotrophs directly or indirectly. 

 
Question : What is the significance of photosynthesis?
Answer : Photosynthesis is the most important and basic process which sustains life on this earth. It has manifold significance such as:
a. It synthesises food from inorganic substances. This food becomes the ultimate source of energy and life for all the living organisms.
b. It is the only known method which release oxygen in the atmosphere and keeps the O2 concentration constant. The consumption of O2 by living organisms during respiration is compensated by photosynthesis.
c. It also helps to keep the CO2 concentration in the atmosphere constant. The CO2 being released due to the respiration of living organisms is being incorporated into glucose during photosynthesis.
d. Coal, petroleum and natural gas are fossil fuels. These have been produced by the application of heat and compression on the past plants.
e. All useful plant products such as timber, rubber, resins, drugs, oils, fibres etc. are derived from the process of photosynthesis.
f. Green plants are the main producers of food in the ecosystem. All other organisms directly or indirectly depend on green plants for food.

Question. Choose the correct statement(s) amongst the following.       
(a) For regulating different life processes energy is required.
(b) Living organisms grow with time.
(c) Living organisms need to repair and maintain their structures.
(d) Molecules within the cells do not exhibit movement.
Answer : B

Question. Identify the correct path of urine in the human body.
(a) Kidney → urinary bladder → urethra → ureter
(b) Urinary bladder → ureter → kidney → urethra
(c) Kidney → ureter → urethra → urinary bladder
(d) Kidney → ureter → urinary bladder → urethra
Answer : D

Question. Coagulation of blood in a cut or wound is brought about by:
(a) plasma
(b) platelets
(c) WBC
(d) RBC
Answer : B

Question. The opening and closing of the stomatal pore depends upon
(a) Oxygen
(b) Temperature
(c) water in the guard cells
(d) concentration of CO2
Answer : C

Question. Name the substances whose build up in the muscles during vigorous physical exercise may cause cramps?
(a) Ethanol + Carbon dioxide + Energy
(b) Lactic acid + Energy
(c) Carbon dioxide + Water + Energy
(d) Pyruvate
Answer : B

Question. The food in autotrophs is reserved in the form of       
(a) protein
(b) fatty acid
(c) glycogen
(d) starch
Answer : D

Question. Which of the following respiratory structures has cartilage rings to prevent it from collapsing?       
(a) Nasal cavity
(b) Pharynx
(c) Larynx
(d) Trachea
Answer : D

Question. Which of the following is the correct sequence representing human alimentary canal?    
(a) Mouth → oesophagus → stomach → small intestine → large intestine
(b) Mouth → small intestine → stomach → oesophagus → large intestine
(c) Mouth → stomach → oesophagus → small intestine → large intestine
(d) Mouth → stomach → oesophagus → large intestine → small intestine
Answer : A

Question. Pancreatic juice is carried by the pancreatic duct into              
(a) large intestine 
(b) liver
(c) duodenum
(d) stomach
Answer : C

Question. Which part of human cell is involved in conversion of pyruvic acid into lactic acid during deficiency of oxygen?       
(a) Golgi body
(b) Mitochondria
(c) Cytoplasm
(d) Lysosome
Answer : C

Question. Which of the following gases turns lime water milky when we blow air into it from mouth?       
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Carbon monoxide
Answer : B

Question. Which of the following processes is responsible for cramps in the muscles of sportsmen?       
(a) Nonconversion of glucose to pyruvate
(b) Conversion of pyruvate to lactic acid due to deficiency of oxygen
(c) Conversion of pyruvate to glucose in presence of oxygen
(d) Conversion of pyruvate to ethanol
Answer : B

Question : Loop of Henle’s is found in:
(a)Lungs
(b) Liver
(c) Nephron
(d) Neuron
Answer : C

Question :  Covering with black paper strips should be tested for presence of 
(a) O2 in leaf
(b) Starch in leaf
(c) Water in leaf
(d) CO2 in leaf
Answer : B
Explanation: The covered part of the leaf does not show presence of starch, while the uncovered part shows starch.

Question : --------------the key organ of, cardiovascular system which acts as a muscular pump.
(a)Kidney
(b) Heart
(c) Lungs
(d) Stomach
Answer : B

Question :  Which gland in the human body which secretes digestive enzymes as well as a hormone? 
(a) Ovary
(b) pancreas
(c) thyroid
(d) Testis
Answer : B
Explanation: Pancreas is both an endocrine and an exocrine gland, in that it functions to produce endocrinic hormones released into the circulatory system (such as insulin, and glucagon), to control glucose metabolism, and also to secrete digestive/exocrinic pancreatic juice (such as trypsin), which is secreted eventually via the pancreatic duct

Question : Which one of the following juices secreted in the human body does not contain any enzyme?
(a)Salivary juice
(b) Bile juice
(c)Gastric juice
(d) Pancreatic juice
Answer : B
 
Question : Select the incorrect pair
(a)Respiration-Oxidation of food to obtain energy
(b)Nutrition-Obtaining and utilizing nutrient
(c)Transportation-Responses to stimuli
(d)Excretion-Removal of waste byproducts
Answer : C 
 

Fill in the blanks.

Question. ...... is the muscular and tubular part of the alimentary canal.
Answer : Oesophagus

Question. The complete process of anaerobic respiration takes place in ...... .
Answer : cytoplasm

Question. ...... energy is used in splitting water molecules into hydrogen and oxygen.
Answer : Light

Question. During photosynthesis light energy is converted into ...... .
Answer : chemical energy

Question. Human lungs have ...... of air sacs for the exchange of gases.
Answer : millions

Write Yes/No.

Question. Is haemoglobin present in WBC?
Answer : No

Question. Are guard cells devoid of chloroplast?
Answer : No

Question. Is pyruvate formed in mitochondria?
Answer : No

Question. Is large intestine the site of complete digestion of proteins?
Answer : No 

Question. Does the breakdown of pyruvate using oxygen take place in mitochondria?
Answer : Yes

 

CCT QUESTIONS:

1. Human Digestive System

""Class-10-Science-Life-Processes

Question. Which of these correctly represent the labels B, C, D and E?
A. Pancreas, Oesophagus, Stomach, Liver
B. Oesophagus, Liver, Stomach, Pancreas
C. Stomach, Liver, Oesophagus, Pancreas
D. Oesophagus, Pancreas, Liver, Stomach
Answer : B

Question. Villi are present in
A. D
B. E
C. F
D. A
Answer : C

Question. The enzyme that is released by the part label A is
A. Trypsin
B. Amino acids
C. Amylase
D. Intestinal juices
Answer : C

Question. The movements that occur along part B to push the food forward.
A. Rotation
B. Peristalsis
C. Flexion
D. Protrusion
Answer : B

Question. In case of diarrhoea, which major process does not take place normally in region G?
A. Absorption of food
B. Absorption of water
C. Secretion of hormones
D. Removal of waste material
Answer : B

 

Assertion Reason Type Questions

Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
A. Both assertion and reason are true, and reason is the correct explanation of assertion.
B. Both assertion and reason are true, but reason is not the correct explanation of assertion.
C. Assertion is true but reason is false.
D. Assertion is false and reason is true.

Question. Assertion: A plant closes its stomata when it does not need carbon dioxide for photosynthesis
Reason: Large amount of water can be lost as vapour through the stomata.
Answer : B

Question. Assertion: Mammals has double circulation.
Reason: Higher energy need due to endothermy (warm blooded).
Answer : A

Question. Assertion: The left atrium and left ventricle are completely separated from the right atrium and the right ventricle.
Reason: Oxygenated and deoxygenated blood never mix with each other inside the heart.
Answer : A

Question. Assertion: In a healthy adult, the initial filtrate in the kidneys is about 180 L daily, but the actual volume excreted is only a litre a day.
Reason: Most of the filtrate is lost from the body in the form of sweat.
Answer : C

 

Very Short Answer

Question. What role is played by stomata during photosynthesis?
Answer : CO2 enters the leaves and O2 is released into air through stomata.

Question. Where is bile stored?
Answer : Gall bladder

Question. Name the organism which converts pyruvate to ethanol.
Answer : Yeast

Question. Where does the second stage of aerobic respiration take place?
Answer : Mitochondria

Question. Which type of organ is vermiform appendix?
Answer : Vestigial

Question. From where does a plant obtain water for photosynthesis?
Answer : Water is absorbed from soil.

Question. What is similar among animals, fungi and some bacteria?
Answer : They cannot prepare their own food.

Question : Why is transpiration important for plants?
Answer : Transpiration is important because:
(1) it helps in absorption and upward movement of water and minerals from roots to leaves.
(2) it prevents the plant parts from heating up.

Question :  What is mode of nutrition in fungi? 
Answer : In fungi, there is saprotrophic mode of nutrition. In this case organisms obtain foodfrom dead and decaying organic matter.

Question :  How does water reach upto the leaves ? 
Answer : Water is taken up by the roots and reaches the leaves through the xylem vessels which are a part of the vascular bundle.

Question :  While eating you are advised not to talk. Why are you advised so? 
Answer : We are advised so because while eating some food particles might enter the wind pipe which can lead to choking.

Question : In the experiment set up to show that “CO2 is given out during respiration”, name the substance taken in the small test tube kept in the conical flask. State its function and the consequence of its use. 
Answer : The substance taken in a small test tube in the conical flask is Potassium Hydroxide or KOH. The KOH solution absorbs the evolved carbon dioxide released by germinating seeds during respiration. The absorption of all the released CO2 gas by KOH solution creates a partial vacuum in the conical flask due to which level of water rises up in the tube.

Question : Define parasitic nutrition. Name an organism having parasitic mode of nutrition.
Answer : Parasitic Nutrition: The parasitic nutrition is that nutrition in which an organism derives its food from the body of another living organism without killing it. Organisms having parasitic mode of nutrition are Plasmodium and round-worms.

Question : In which form do plants store the carbohydrates which are not used immediately?
Answer : Plants store carbohydrates which are not used immediately in the form of starch.

Question : How is the opening and closing of stomatal pore regulated in plants?
Answer : The opening and closing of stomatal pores is a function of guard cells. When water flows into guard cells, they swell up causing the stomatal pore to open. When the guard cells shrink, the pore closes.

Question : If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? Justify your answer. 
Answer : If the plant shows evidence that it is releasing CO2 during the day and taking in oxygen, it does not mean that there is no photosynthesis taking place in the plant. Instead, it suggests that the plant is undergoing photosynthesis at a very low rate. In a normal scenario, the rate of respiration is higher during night while it is slower during the day. The CO2 produced during night time is utilized by the plant during the day to perform photosynthesis. 

Question :  Name the system responsible for transportation of materials in human body. 
Answer : 1) Blood vascular system
2) Lymphatic system

Question :  Mention the role of pancreatic enzyme. 
Answer : Pancreatic enzymes help break down fats, proteins and carbohydrates. A normally functioning pancreas secretes about 8 cups of pancreatic juice into the duodenum, daily. This fluid contains pancreatic enzymes to help with digestion and bicarbonate to neutralize stomach acid as it enters the small intestine. Pancreatic enzyme trypsin helps in digesting protein and the pancreatic amylase helps in the breakdown of starch.  

Question :  We say that movement is a characteristic of living organisms but we always don’t see visible movements in plants. Comment. 
Answer : We always don’t see visible movements in plants. It does not mean that they are not alive. Molecular movements take place in their body.

Question :  If a person is working on a treadmill in a gymnasium, will it effect his rate of breathing? How?
Answer : Yes, it will affect his rate of breathing. The rate of breathing will become fast to supply more oxygen to meet the increased demand of energy.

Question : Where does aerobic respiration occurs in a cell?
Answer : Aerobic respiration occurs in mitochondria of the cell.

Question :  If you compare your rate of breathing by feeling your chest movement with the number of times a fish opens and closes its mouth. Which will be higher and why? 
Answer : The number of times a fish opens and closes its mouth will be higher as the amount of dissolved oxygen in water is fairly low compared to the amount of oxygen in the air. Therefore, rate of breathing in aquatic organisms is much faster than in terrestrial organisms. 

Question :  Mucus is not used for churning the food or digesting it. Then why is it secreted in the stomach? 
Answer : Mucus is secreted in the stomach to protect its inner lining from being damaged by HCl. Excessive secretion of HCl can damage the lining and lead to peptic ulcer. 

Question :  In the process of Photosynthesis food A is prepared which gets converted into food B. What are A and B? Why is A converted to B? 
Answer : Food A is glucose and food B is Starch. A is converted to B as B is insoluble form of carbohydrate. It is more compact and hence, suitable for storage.

Question : What is the role of acid in our stomach?
Answer : HCl of gastric juice disinfects the food and make the medium acidic for proper functioning of pepsin.

Question :  When we are asleep we are not performing any activity still our life processes are going on. Why? 
Answer : The maintenance functions of living organisms must go on even when they are not doing anything particular.” That is why the life processes are going on even while we are asleep or not performing any activity. 

 

Short Answer

Question : Describe the process of urine formation in kidneys.
Answer : The purpose of making urine is to filter out waste products from the blood. The basic filtration unit in the kidneys, is a cluster of very thin-walled blood capillaries. Each capillary cluster in the kidney is associated with the cup-shaped end of a tube that collects the filtered urine. Each kidney has large numbers of these filtration units called nephrons. Nephrons are packed close together. Some substances in the initial filtrate, such as glucose, amino acids, salts and a maor amount of water, are selectively re-absorbed as the urine flows along the tube. The amount of water reabsorbed depends on how much excess water is in the body and on how much of dissolved waste is to be excrete(d) The urine forming in each kidney eventually enters a long tube, called the ureter, which connects the kidneys with the urinary bladder. Urine is stored in the urinary bladder until the pressure of the expanded bladder leads to the urge of passing it out through the urethr(a) As a result, we can usually control the urge to urinate.

Question : List four functions of the human heart. Why is double circulation necessary in the human body?
Answer : Functions of the human heart are listed below:
(1) The human heart is a muscular organ that pumps oxygenated blood throughout the body.
(2) The Left Atrium of the heart receives the oxygenated blood from the lungs.
(3) The Right Atrium of the heart receives the deoxygenated blood froam different parts of our body.
(4) The Right Ventricle of the heart sends the deoxygenated blood to the lungs for oxygenation. Double circulation is necessary as the separation of oxygenated and deoxygenated blood allows a more efficient supply of

Question : What is photosynthesis? Explain its mechanism.
Answer : Photosynthesis– A process in which green plants takes carbon dioxide and water and converts them into carbohydrates in the presence of sunlight and chlorophyll.

 Life Processes_9

Mechanism:
(i)Absorption of light energy by chlorophyll.
(ii)Conversion of light energy to chemical energy.
(iii)Splitting of water molecules (H2O) into hydrogen and oxygen.
(iv)Reduction of carbon dioxide to carbohydrate.

 Life Processes_10

 

Question :  Leaves of a healthy potted plant were coated with petroleum jelly. How will it affect the plant? State two reasons. 
Answer : The plant will not remain healthy for long due to the following reasons:-
1.There will be no transpiration.
2. There will be no exchange of gases which will affect the rate of photosynthesis.

Long Answer

Question : Answer the following:
(A) What would happen if all the green plants disappear from the earth?
(B) If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? justify your answer.
Answer :  (A) Green plants are the sources of energy for all organisms. If all green plants disappear from the earth, all the herbivore will die due to starvation and so will the carnivores.
Since autotrophs are the only organisms that can fix the atmospheric carbon dioxide into organic compounds, these organisms occupies first trophic level in food chain and serve as source of food and energy for all other organisms of higher trophic evels (heterotrophs/consumers). Hence, in absence of these plants, whole functioning of whole ecosystem will come to a halt due to lack of food and energy source for consumers (herbivores, carnivores and omnivores)
(B) Respiration is the process of oxidation of food substances that release carbon dioxide; it takes place throughout the day. Photosynthesis is the process of fixing the atmospheric carbon dioxide into organic compounds (carbohydrates) with release of oxygen gas as by product. Photosynthesis takes place during the day in presence of Sunlight only.
The CO2 released during respiration is absorbed by plants for photosynthesis during day causing net release of oxygen only. If a plant is releasing carbon dioxide and taking in oxygen during the day, it means that either rate of photosynthesis is too slow to counter balance the release of CO2 by respiration or photosynthesis is not taking place at all.

Question : Describe the process of urine formation in kidneys. 
Answer : Urine is formed in the nephron of kidneys. Nephron is the structural and functional unit of the kidney. Blood at high pressure travels into these tubules by the tuft of blood capillaries called glomerulus contained in Bowman's capsule.
The following steps are involved in the process:
i. Filtration: Blood enters the glomerulus through the afferent arterioles It passes under high pressure that results in the filtration of bloo(d) Water and small molecules are forced out of glomerular capillary walls and Bowman’s capsule.
Large molecules remain in the blood of the glomerulus.
ii. Selective reabsorption: Some molecules are selectively reabsorbed into the bloo(d) The glomerular filtrate flows through the proximal convoluted tubule, the U-shaped Henle’s loop and distal convoluted tubule. The useful substances such as glucose, amino acids and salts which require energy are reabsorbed by a process called selective reabsorption. Hence, the filtrate now contains urea, some salts and water. Reabsorption of solutes increases the water concentration of the filtrate.
Water is then reabsorbed into the blood by osmosis.
iii. Tubular secretion: Some nitrogenous waste products like creatinine and some other substances like K+ are removed from the blood by DCT (Distal Convoluted Tubule) and are passed to bloo(d) The urine thus formed is collected in the urinary bladder.
Chapter 01 Chemical Reactions and Equations
CBSE Class 10 Science Chemical Reactions and Equations Assignment

More Study Material

CBSE Class 10 Biology Chapter 6 Life Processes Assignment

We hope you liked the above assignment for Chapter 6 Life Processes which has been designed as per the latest syllabus for Class 10 Biology released by CBSE. Students of Class 10 should download and practice the above Assignments for Class 10 Biology regularly. We have provided all types of questions like MCQs, short answer questions, objective questions and long answer questions in the Class 10 Biology practice sheet in Pdf. All questions have been designed for Biology by looking into the pattern of problems asked in previous year examinations. 

Assignment for Biology CBSE Class 10 Chapter 6 Life Processes

Our team of expert teachers have referred to NCERT book for Class 10 Biology to design the Biology Class 10 Assignments. If you practice at least one test paper daily, you will get higher marks in Class 10 exams this year. Daily practice of Biology course notes and related study material will help you to clear all your doubts and have stronger understanding of all concepts. You can download all Revision notes for Class 10 Biology also from www.studiestoday.com absolutely free of cost.

Chapter 6 Life Processes Assignment Biology CBSE Class 10

All questions and their answers for the assignment given above for Class 10 Biology have been developed as per the latest curriculum and books issued for the current academic year. The students of Class 10 can rest assured that the best teachers have designed the questions of Biology so that you are able to revise the entire syllabus if you do the assignments. Lot of MCQ questions for Class 10 Biology have also been given in the worksheets and assignments for regular use. All study material for Class 10 Biology students have been given on studiestoday.

Chapter 6 Life Processes Assignment CBSE Class 10 Biology

Regular assignment practice helps to get a more comprehensive understanding of Chapter 6 Life Processes concepts. Assignments play a crucial role in understanding Chapter 6 Life Processes in CBSE Class 10. Students can download all the assignments of the same chapter in Class 10 Biology in Pdf format. You can print them or read them online on your computer or mobile.

CBSE Biology Class 10 Chapter 6 Life Processes Assignment

CBSE Class 10 Biology latest books have been used for coming up with the latest questions and solutions for the above assignment. If you have revised all concepts relating to Chapter 6 Life Processes then you should attempt all questions given in the test sheets above. We have also provided lot of Worksheets for Class 10 Biology which you can use to further make your self stronger in Biology

Where can I download in PDF assignments for CBSE Class 10 Biology Chapter 6 Life Processes

You can download free Pdf assignments for CBSE Class 10 Biology Chapter 6 Life Processes from StudiesToday.com

The assignments for Chapter 6 Life Processes Class 10 Biology for have been made based on which syllabus

The Chapter 6 Life Processes Class 10 Biology Assignments have been designed based on latest CBSE syllabus for Class 10 Biology issued for the current academic year

Can I download and print these printable assignments for Biology Chapter 6 Life Processes Class 10

Yes, These printable assignments for Chapter 6 Life Processes Class 10 Biology are free to download and print

How many topics are covered in Chapter 6 Life Processes Biology assignments for Class 10

All topics given in Chapter 6 Life Processes Biology Class 10 Book for the current academic year have been covered in the given assignment

Is there any charge for this assignment for Chapter 6 Life Processes Biology Class 10

No, all Printable Assignments for Chapter 6 Life Processes Class 10 Biology have been given for free and can be downloaded in Pdf format

How can I download the printable test assignments for Chapter 6 Life Processes Biology Class 10

Just click on the View or Download button below, then another window with the Pdf will be visible, just click on the Pdf icon to download the free assignments for Chapter 6 Life Processes Class 10 Biology

Are these assignments available for all chapters in Class 10 Biology

Yes, apart from Biology you can download free assignments for all subjects in Class 10

Can I download solved assignments for Chapter 6 Life Processes CBSE Class 10 Biology

Our team of expert teachers at studiestoday.com have provided all answers for the practice questions which have been given in Class 10 Biology Chapter 6 Life Processes assignments