CBSE Class 10 Biology Life Processes MCQs Set E

Question: The raw materials for photosynthesis are
a) CO₂ & O₂₁
b) sunlight and CO₂
c) water and chlorophyll
d) CO₂ and water.
Answer: d

Question: Among the following which is a parasitic plant ?
a) Plasmodium
b) Cuscuta
c) Amoeba
d) Rhizobium
Answer: b

 Question: The function of the lymph fluid is to
a) Drains excess fluid from extracellular space back into the blood
b) Carries digested and absorbed fat from intestine
c) Circulates around the body and help in clotting of blood
d) Both Drains excess fluid from extracellular space back into the blood and Carries digested and absorbed fat from intestine
Answer: d

Question: Full name of N ADP is
a) Nicotinamide dinucleotide phosphate
b) Nicotine adenine dinuceotide phosphate
c) Nicotinamide adenine dinucleotide phosphate
d) None of the above
Answer: c

 Question: The ultimate cause for the movement of water against the gravity in a tree is
a) osmosis
b) transpiration
c) imbibitions
d) photosynthesis
Answer: b

 Question: The transport of water and minerals in plants is done by
a) xylem
b) hormone
c) tissues
d) chloroplast
Answer: a

Question: The organism having parasitic mode of nutrition is:
a) Penicillium
b) Plasmodium
c) Paramecium
d) Parrot
Answer: b

Question: A few drops of iodine solution were added to rice water. The solution turned blue-black in colour.
This indicated that rice water contains
a) Complex proteins
b) Simple proteins
c) Fats
d) Starch
Answer: d

Question: Photosynthesis is a
a) Catabolic process
b) Parabolic process
c) Amphibolic process
d) Photochemical process
Answer: d

Question: Select the appropriate equation which shows the summary of photosynthesis
a) 6CO₂ + 12H₂O C₆H₁₂O₆ + 6O₂ + 6H₂O
b) 6CO₂ + H₂O + Sunlight C₆H₁₂O₆ + O₂ + 6H₂O
c) 6CO₂ + 12H₂O + Chlorophyll + Sunlight C₆H₁₂O₆ + 6O₂ + 6H₂O
d) 6CO₂ + 12H₂O + Chlorophyll + Sunlight C₆H₁₂O₆ + 6CO₂ + 6H₂O
Answer: c

Question: Oxygen liberated during photosynthesis comes from
a) Water
b) Chlorophyll
c) Carbon dioxide
d) Glucose
Answer: a

Question: The final product of digestion of carbohydrates and proteins are
a) glycerol and amino acid respectively
b) glucose and amino acids respectively
c) amino acids and glycerol respectively
d) amino acids and glucose respectively
Answer: b

Question: An example for autotrophic nutrition
a) Green plants
b) Fungi
c) Bacteria
d) Humans
Answer: a

 Question: The correct sequence of anaerobic reactions in yeast is
a) Glucose Cytoplasm → Pyruvate mitochondria →Ethanol + Carbon dioxide
b) Glucose Cytoplasm → Pyruvate Cytoplasm →Lactic acid
c) Glucose Cytoplasm → Pyruvate mitochondria →Lactic acid
d) Glucose Cytoplasm → Pyruvate Cytoplasm →Ethanol + Carbon dioxide
Answer: d

 Question: Structural and functional unit of kidney is:
a) Nephron
b) Ureter
c) Neuron
d) Urethra
Answer: a

Question: Oxygen is transported in blood mainly by
a) leucocytes
b) erythrocytes
c) thrombocytes
d) blood plasma
Answer: b

Question: Rings of cartilage present in the throat ensure that
a) the air passage collapses
b) the air passage does not collapse
c) the air is filtered entering the nostrils
d) none of the options
Answer: b

Question: The nutrition in mucor is
a) parasitic
b) autotrophic
c) saprophytic
d) holozoic
Answer: c

Question: Which of the following statements is incorrect about artery?
a) It carries oxygenated blood from heart to different body parts.
b) It is also called collecting vessel
c) It is thick, elastic and muscular
d) It has no valves.
Answer: b

 Question: The image shows how Amoeba obtains nutrition. How is this process advantageous for Amoeba?
a) capturing of food takes less time
b) complex food can be digested easily
c) more amount of food can be consumed
d) fast distribution of nutrition within the body
Answer: d

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

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: The most important function of villi in the small intestine is
a) to provide strength to the intestine
b) to provide space for capillaries and lacteals
c) to provide increased surface area for absorption of digested food
d) to provide habitat for bacteria
Answer: c

Question: How is food transported from phloem to the tissues according to plants' needs?
a) food is transported along with the water in the plant's body.
b) food is transported in only direction like water in the plant body through xylem.
c) food is transported from a region with low concentration to higher concentration.
d) Food is transported from a region where it is produced to other parts of the plants.
Answer: d

Question: Nuclei can be seen clearly seen in a well prepared slide of epidermal peel of a leaf in the
a) Guard cells only
b) Epidermal cells only
c) Guard cells as well as epidermal cells
d) Stomata, guard cells and epidermal cells
Answer: c

Question: Blood from superior vena cava flows into------------
a) Right atrium
b) Right ventricle
c) Left atrium
d) Left ventricle
Answer: a

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

Question: The image shows the human digestive system.

Digestion of food starts from which organ of the digestive system?

a) Mouth due to the presence of saliva.
b) Pancreas that releases juices for fat breakdown.
c) Oesophagus that moves the food in gut.
d) Stomach which helps in mixing food with digestive juices.
Answer: a

Question: The blood plasma without fibrinogen is called
a) serum
b) bone marrow
c) liquid tissue
d) none of the options.
Answer: a

Question: Oxygen liberated during photosynthesis comes from
a) water
b) chlorophyll
c) carbon dioxide
d) glucose
Answer: a

Question: The blood leaving the tissues becomes richer in
a) carbon dioxide
b) water
c) heamoglobin
d) oxygen
Answer: a

Question: The image shows a cross section of small intestine.

What will be the likely happen if the number of villi increases in the intestine?

a) Increase in the absorption of food.
b) Fast breakdown of larger food particles into smaller ones.
c) Increase in flow of blood in the small intestine.
d) Fast elimination of waste from the body.
Answer: a

 Question: The doctor measured Ravi’s blood pressure and said it is normal now. The range of Ravi’s blood pressure (systolic/diastolic) is likely to be-
a) 120/80mm of Hg
b) 160/80mm of Hg
c) 120/60mm of Hg
d) 180/80mm of Hg
Answer: a

Question: Which of the following is a life process?
a) Respiration
b) Transportation
c) Excretion
d) All of these
Answer: d

Question: Given alongside is a sketch of a leaf partially covered with black paper and which is to be used in the experiment to show that light is compulsory for the process of photosynthesis. At the end of the experiment, which one of the leaf parts labelled I, II and III will become black when dipped in iodine solution? 

a) I only
b) II only
c) I and III
d) II and III
Answer: c

Question: Saliva contains an enzyme called:
a) Trypsin
b) Ptyalin
c) Amylase
d) Pepsin
Answer: c

 Question: The respiratory pigment in human beings is:
a) carotene
b) chlorophyll
c) haemoglobin
d) mitochondria
Answer: c

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: During respiration, the exchange of gases take place in:
a) Trachea and larynx
b) Alveoli of lungs
c) Alveoli and throat
d) Throat and larynx
Answer: b

Question: The image shows the transport of gases in the body through the heart and lungs.
Which option correctly shows the transport of oxygen to the cell?
a) Lungs →pulmonary vein →left atrium →left ventricle →aorta → body cells
b) Lungs →pulmonary vein →right atrium →right ventricle → aorta → body cells
c) Lungs →pulmonary artery →left atrium → left ventricle → vena cava → body cells
d) Lungs →pulmonary artery →right atrium → right ventricle→ vena cava → body cells
Answer: a

Question: Which of the following ahs no digestive enzyme ?
a) Saliva
b) Bile
c) Gastric juice
d) Intestinal juice
Answer: b

Question: Plants are green in colour because
a) they absorb green light only
b) they reflect green light
c) they absorb green light but reflect all other lights
d) none of the above are correct.
Answer: b

Question: Chemical reaction takes place during dark reaction of photosynthesis is
a) photolysis
b) hydrolysis
c) carbon dioxide is bonded with RUBP
d) nitrogen fixation
Answer: c

Question: The process by which organism takes nutrients is called
a) Nutrition
b) Respiration
c) Photosynthesis
d) Circulation
Answer: a

Question: The breakdown of food in cells to release energy is called
a) Photosynthesis
b) Respiration
c) Transpiration
d) Digestion
Answer: b

Question: The image shows the excretory system in humans.What is the importance of the labelled part in the excretory system?
a) It produces urine.
b) It filters waste from the blood.
c) It stores the urine till urination.
d) It carries urine from the kidney to the outside.
Answer: c

Question: The presence of sugar in onion leaves can be tested with
a) iodine
b) copper sulphate solution
c) lime water
d) benedict’s solution
Answer: d

Question: Dark reaction and light reaction of photosynthesis takes place in
a) stroma and grana of chloroplast respectively
b) grana and stroma of chloroplast respectively
c) grana only
d) stroma only
Answer: a

Question: The digestion of food is completed in the
a) ileum
b) duodenum
c) stomach
d) large intestine
Answer: a

Question: A plant gets rid of excess water through transpiration. Which is a method used by plants to get rid of solid waste products?
a) shortening of stem
b) dropping down of fruits
c) shedding of yellow leaves
d) expansion of roots into the soil
Answer: c

Question: Which of the following is an incorrect statement?
a) Organisms grow with time.
b) Organisms must repair and maintain their structure.
c) Movement of molecules does not take place among cells.
d) Energy is essential for life processes
Answer: b

Question: Which of the following is most appropriate for aerobic respiration?
a) Glucose ^mitochondria →Pyruvate ^Cytoplasm →CO₂ + H₂O + Energy
b) Glucose ^Cytoplasm →Pyruvate ^mitochondria →CO₂ + H₂O + Energy
c) Glucose ^Cytoplasm →Pyruvate + Energy ^mitochondria →CO₂ + H₂O
d) Glucose ^Cytoplasm →Pyruvate + Energy ^mitochondria →CO₂ + H₂O + Energy
Answer: d

 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: The contraction and expansion movement of the walls of the food pipe is called:
a) translocation
b) transpiration
c) peristaltic movement
d) digestion
Answer: c