CBSE Class 10 Biology Life Processes MCQs Set J

Question: Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of
a) hydrochloric acid
b) fat
c) carbon dioxide
d) lactic acid
Answer: d

Question: The green colour of plants is due to the presence of
a) chlorophyll
b) carotene
c) xanthophyll
d) starch
Answer: a

Question: The vein which brings clean blood from the lungs into the heart is known as
a) pulmonary vein
b) hepatic vein
c) superior vena cava
d) pulmonary artery
Answer: a

Question: Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?
a) Mucus
b) Pepsin
c) Trypsin
d) Bile
Answer: a

Question: Name a circulatory fluid in the human body other than blood.
a) Platelets
b) RBC
c) Lymph
d) Plasma
Answer: c

Question: The internal (cellular) energy reserve in autotrophs is
a) glycogen
b) protein
c) starch
d) fatty acid
Answer: c

Question: Lack of oxygen in muscles often leads to cramps among cricketers. This results due to
a) conversion of pyruvate to ethanol
b) conversion of pyruvate to glucose
c) non-conversion of glucose to pyruvate
d) conversion of pyruvate to lactic acid
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 ureter urinary bladder urethra
d) Urinary bladder kidney ureter urethra
Answer: c

Question: Rings of cartilage present in the throat ensure that
a) air is filtered
b) air is at room temperature
c) air passage does not collapse
d) air is free of microbes
Answer: c

Question: When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of
a) oxygen
b) carbon dioxide
c) nitrogen
d) water vapour
Answer: b

Question: Movement of the synthesized products from the leaves to the roots and other parts of a plant’s body takes place through the phloem. This process is known as
a) translocation
b) transpiration
c) transportation
d) excretion
Answer: a

Question: Raw materials required in the autotrophic mode of nutrition involves:
a) (i), (ii) and (iii)
b) (i) and (ii)
c) (i), (ii) and (iv)
d) All (i), (ii), (iii) and (iv)
Answer: c

Question: The enzymes in pancreatic juice help in the digestion of
a) fats and carbohydrates
b) proteins and fats
c) proteins and carbohydrates
d) proteins, fats and carbohydrates
Answer: d

Question: The opening and closing of the stomatal pore depends upon
a) oxygen
b) temperature
c) water in guard cells
d) concentration of CO₂ in stomata
Answer: c

Question: Name the tube which connects the kidneys to the urinary bladder.
a) Urethra
b) Nephron
c) Tubule
d) Ureter
Answer: d

Question: The inner lining of the 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

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: Blood from superior vena cava flows into
a) right atrium
b) right ventricle
c) left atrium
d) left ventricle
Answer: a

Question: Which of the following organisms absorbs nutrition with haustoria?
a) A carnivore
b) A herbivore
c) A parasite
d) A saprophyte
Answer: c

Question: Single circulation, i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by
a) Labeo, Chameleon, Salamander
b) Hippocampus, Exocoetus, Anabas
c) Hyla, Rana, Draco
d) Whale, Dolphin, Turtle
Answer: b

Question: Which among the following procedures is used for cleaning the blood of a person by separating the waste substance from it?
a) Kidney transplant
b) Blood transfusion
c) Dialysis
d) Hydrolysis
Answer: c

Question: Temporary finger like extensions on Amoeba are called
a) cell wall
b) pseudopodia
c) cell membrane
d) cilia
Answer: b

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

Question: In which part of the alimentary canal food is finally digested?
a) Stomach
b) Mouth cavity
c) Small intestine
d) Large intestine
Answer: c

Question: Blood consist of what fluid medium?
a) Lymph
b) Plasma
c) Platelets
d) All of these
Answer: b

Question: Which is the first enzyme to mix with food in the digestive tract?
a) Cellulase
b) Pepsin
c) Amylase
d) Trypsin
Answer: c

Question: In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?
a) Amphibians and reptiles
b) Pisces and amphibians
c) Amphibians only
d) Pisces only
Answer: d

Question: During respiration exchange of gases take place in
a) alveoli of lungs
b) trachea and larynx
c) throat and larynx
d) alveoli and throat
Answer: a

Question: One cell-thick vessels are called
a) arteries
b) veins
c) capillaries
d) pulmonary artery
Answer: c

Question: The mode of nutrition found in fungi is
a) parasitic nutrition
b) holozoic nutrition
c) autotrophic nutrition
d) saprotrophic nutrition
Answer: d

Question: Roots of the plants absorb water from the soil through the process of
a) diffusion
b) transpiration
c) osmosis
d) none of these
Answer: c

Question: The excretory unit of the human excretory system is known as
a) nephridia
b) kidneys
c) neuron
d) nephron
Answer: d

Question: During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the
a) chloroplast
b) mitochondria
c) golgi body
d) cytoplasm
Answer: d

Question: Lipase acts on
a) carbohydrates
b) fats
c) amino acids
d) all of these
Answer: b

Question: Which element is used in the synthesis of proteins?
a) Hydrogen
b) Oxygen
c) Nitrogen
d) Carbon dioxide
Answer: c

Question: Which of these juices is secreted by pancreas?
a) Pepsin
b) Trypsin
c) Bile juice
d) Both (a) and (b)
Answer: b

Question: The exit of unabsorbed food material is regulated by
a) liver
b) anus
c) small intestine
d) anal sphincter
Answer: d

Question: In which mode of nutrition an organism derives its food from the body of another living organism without killing it?
a) Saprotrophic nutrition
b) Parasitic nutrition
c) Holozoic nutrition
d) Autotrophic nutrition
Answer: b

Question: Plants use the energy stored in ATP to accomplish the process of transportation of
a) oxygen
b) food
c) water and minerals
d) water, minerals and food
Answer: b

Question: Which of the following are energy foods?
a) Carbohydrates and fats
b) Proteins and mineral salts
c) Vitamins and minerals
d) Water and roughage
Answer: a

Question: The part of the digestive system where no digestion takes place is
a) Mouth
b) Ileum
c) Stomach
d) Oesophagus
Answer: d

Question: Pick out the metal that is associated with haemoglobin
a) Aluminum
b) Calcium
c) Potassium
d) Iron
Answer: d

Question: The breakdown of pyruvate to give CO₂, water and energy takes place in
a) Nucleus
b) Chloroplast
c) Mitochondria
d) Cytoplasm
Answer: c

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 part of an alimentary canal that receives bile from the liver is
a) Stomach
b) Small intestine
c) Large intestine
d) Oesophagus
Answer: b

Question: The element used in the synthesis of proteins is
a) Hydrogen
b) Oxygen
c) Nitrogen
d) Carbon dioxide
Answer: c

Question: The nutrient that is chiefly digested in the stomach is
a) Carbohydrates
b) Proteins
c) Fats
d) Lipids
Answer: b

Question: A gland not associated with the alimentary canal is
a) Liver
b) Pancreas
c) Salivary glands
d) Adrenal
Answer: d

Question: Choose the function of 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: The fermentation of glucose by yeast normally yields
a) Alcohol, CO₂ and 36 ATP
b) CO₂, H₂O and 36 ATP
c) Alcohol, CO₂ and 2 ATP
d) Lactic acid, CO₂ and 2 ATP
Answer: c

Question: The sphincter muscles that help in regulating the exit of food from stomach into the small intestine is
a) Ileocecal sphincter
b) Pyloric sphincter
c) Cardiac sphincter
d) Anal sphincter
Answer: b

Question: When ATP is broken down using water, energy is released which is equivalent to
a) 60.5 KJ/mol
b) 30.5 KJ/mol
c) 36.5 KJ/mol
d) None of these
Answer: b

Question: The enzyme Pepsin is inactive in stomach without the presence of
a) Nitric acid
b) Acetic acid
c) Butyric acid
d) Hydrochloric acid
Answer: d

Question: The exit of unabsorbed food material is regulated by
a) Pyloric sphincter
b) Anus
c) Small intestine
d) Anal sphincter
Answer: d

Question: Large intestine in man mainly carries out
a) Absorption
b) Assimilation
c) Digestion of fats
d) Digestion of carbohydrates
Answer: a

Question: Products of anaerobic respiration in muscles are
a) Lactic acid and energy
b) Lactic acid, carbon dioxide and energy
c) Lactic acid, water and energy
d) Lactic acid, water, carbon dioxide and energy
Answer: a

Question: Respiratory pigment in human body is
a) Water
b) Chlorophyll
c) Blood
d) Haemoglobin
Answer: d

Question: The organism that can live without oxygen of air is
a) Amoeba
b) Sheep
c) Yeast
d) Leech
Answer: c