Enhance your learning with our unique resource: CBSE Class 10 Science MCQs Chapter 6 – Life Processes: Unlocking the Path to Success!
We understand the importance of tackling multiple-choice questions effectively in your board exams. That’s why our meticulously crafted Life Processes Class 10 MCQs cover a wide range of concepts from Chapter 6, focusing on the fascinating realms of transport and excretion in various organisms.
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MCQ Questions for Class 10 Science Chapter 6 Life Processes with Answers
1. In humans, right auricle receives ________ blood from __________
(a) Oxygenated, aorta
(b) Deoxygenated, vena cava
(c) Oxygenated, vena cava
(d) Deoxygenated, aorta
Ans. Deoxygenated, vena cava
2. Where does the maximum exchange of material between blood and surrounding cells occur?
(a) Heart
(b) Veins
(c) Arteries
(d) Capillaries
Ans. Capillaries
3. Superior and inferior vena cava respectively carries blood from
(a) Upper and lower parts of body
(b) Lower and upper parts of body
(c) Upper and lateral parts of the body
(d) Lateral and lower parts of the body
Ans. Upper and lower parts of body
4. Which of the following is the correct path of urine in our body :-
(a) Kidney → urinary bladder → urethra → ureter
(b) Urinary bladder → ureter → kidney → urethra
(c) Kidney → ureter → urinary bladder → urethra
(d) Kidney → ureter → urethra → urinary bladder
Ans. Kidney → ureter → urinary bladder → urethra
5. Which of the following statements about the autotrophs is correct?
(a) They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll
(b) They store protein in the form of starch
(c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight
(d) They constitute the second trophic level in food chains
Ans. They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll
6. Carbon and energy requirements of the autotrophic organism are fulfilled by
(a) enzymes
(b) photosynthesis
(c) bacteria
(d) none of the above
Ans. photosynthesis
7. Which of the following statements is correct regarding Glycolysis?
(i) Glycolysis is the metabolic pathway that converts glucose C6H12O6, into pyruvate.
(ii) Glycolysis is the first pathway used in the breakdown of glucose to extract energy.
(iii) Glycolysis takes place in the cytoplasm of both prokaryotic and eukaryotic cells.
(a) (i) statement is correct regarding Glycolysis.
(b) (i) and (ii) statements are correct regarding Glycolysis.
(c) (ii) and (iii) statements are correct regarding Glycolysis.
(d) All the above statements are correct regarding Glycolysis.
Ans. All the above statements are correct regarding Glycolysis.
8. 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
Ans. Dialysis
9. In respiration, air passes through:-
(a) Pharynx → nasal cavity → larynx → trachea bronchi → bronchioles
(b) Nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles
(c) Larynx → nasal cavity→ pharynx → trachea
(d) Larynx → pharynx → trachea → lungs → nasal cavity
Ans. Nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles
10. Assertion (A): Herbivores have longer small intestines as compared to carnivores.
Reason (R): Complete digestion of food takes place in the small intestine.
(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion.
(b)Both (A) and (R) are true, but (R) is not the correct explanation of the assertion.
(c)(A) is true, but (R) is false
(d)(A) is false, but (R) is true.
Ans. Both (A) and (R) are true, but (R) is not the correct explanation of the assertion.
11. Choose the event that does not occur in photosynthesis.
(a) Absorption of light energy by chlorophyll
(b) Reduction of carbon dioxide to carbohydrates
(c) Oxidation of carbon to carbon dioxide
(d) Conversion of light energy to chemical
energy
Ans. Oxidation of carbon to carbon dioxide
12. Which of the following statements (s) is (are) true about respiration?
(i) During inhalation, ribs move inward and the diaphragm is raised
(ii) In the alveoli, exchange of gases takes place, i.e. oxygen from alveolar air diffuses into blood and carbon dioxide from the blood into alveolar air
(iii) Haemoglobin has a greater affinity for carbon dioxide than oxygen
(iv) Alveoli increases surface area for exchange of gases
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)
Ans. (ii) and (iv)
13. Photosynthesis is a ____________ process during which plant use energy from sunlight to convert carbon dioxide and water into sugar molecules
(a) Photosynthesis
(b) Nutrition
(c) catabolic
(d) anabolic
Ans. anabolic
14. Which of the following statements is incorrect about the autotrophs?
(a) The synthesis of 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) All are correct
Ans. They convert Carbon dioxide and water into carbohydrates in the absence of sunlight
15. 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
Ans. trypsin digests proteins and lipase emulsified fats
16. Which statement is true :-
(a) Compensation point is a point when rate of respiration becomes equal to rate of photosynthesis
(b) compensation point is that at which photosynthesis occur
(c) compensation point is a point when rate of catabolic process becomes equal to rate of anabolic process
(d) Compensation point is a point when a plant cant photosynthsize
Ans. Compensation point is a point when rate of respiration becomes equal to rate of photosynthesis
17. If salivary amylase is lacking in saliva, which of the event in mouth will be affected
(a) Proteins breaking down into amino acids
(b) starch breaking down into sugars
(c) Fats breaking down into fatty acids and glycerol
(d) Absorption of vitamins
Ans. starch breaking down into sugars
18. Which of the following correctly describes the transport of respiratory gases in humans?
(a) Carbon dioxide is transported attached to haemoglobin while oxygen is transported in dissolved form
(b) Oxygen is transported attached to haemoglobin while Carbon dioxide is transported in dissolved form
(c) Both gases are transported with the help of haemoglobin only
(d) Both gases are transported in dissolved form only
Ans. Oxygen is transported attached to haemoglobin while Carbon dioxide is transported in dissolved form
19. The main difference between the composition of lymph and blood is _______
(a) Blood contain RBCs and more proteins
(b) Lymph do not contain RBCs but has more proteins
(c) Lymph do not contain any type of cells that are present in the blood
(d) Blood is liquid due to plasma but lymph is jelly-like due to dissolved minerals.
Ans. Blood contain RBCs and more proteins
20. Assertion (A): Carbon dioxide is mostly transported in the dissolved form in the blood. Reason (R): Carbon dioxide is more soluble in water than oxygen.
(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion.
(b) Both (A) and (R) are true, but (R) is not the correct explanation of the assertion.
(c)(A) is true, but (R) is false
(d)(A) is false, but (R) is true.
Ans. Both (A) and (R) are true and (R) is the correct explanation of the assertion.
21. In which of the following groups of organisms, food material is broken down outside the body and absorbed?
(a) Mushroom, green plants, Amoeba
(b) Yeast, mushroom, bread mould
(c) Paramecium, Amoeba, Cuscuta
(d) Cuscuta, lice, tapeworm
Ans. Yeast, mushroom, bread mould
22. ____________ is the process by which autotrophs take in substance from the outside and convert them into stored form of energy this material is taken in the form of carbon dioxide and water which is converted into carbohydrate in the presence of sunlight and chlorophyll
(a) Digestion
(b) Respiration
(c) reproduction
(d) photosynthesis
Ans. photosynthesis
23. Assertion (A): Transpiration cools leaf surface.
Reason (R): Transpiration helps in translocation of sugar in plaats.
(a)Both (A) and (R) are true and (R) is the correct explanation of the assertion.
(b) Both (A) and (R) are true, but (R) is not the correct explanation of the assertion.
(c) (A) is true, but (R) is false
(d) (A) is false, but (R) is true
Ans. (A) is true, but (R) is false
24. Choose the correct statement that describes arteries.
(a) They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart
(b) They have thin walls with valves inside, blood flows under low pressure and carry blood away from the heart to various organs of the body
(c) They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body
(d) They have thick elastic walls without valves inside, blood flows under high pressure and carries blood away from the heart to different parts of the body.
Ans. They have thick elastic walls without valves inside, blood flows under high pressure and carries blood away from the heart to different parts of the body.
25. Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva?
(a) Starch breaking down into sugars.
(b) Proteins breaking down into amino acids.
(c) Absorption of vitamins.
(d) Fats breaking down into fatty acid into glycerol.
Ans. Starch breaks down into sugars.
26. In which mode of nutrition an organism derives its food from the body of another living organism without killing it?
(a) Saprotrophic nutrition
(b) Holozoic nutrition
(c) Parasitic nutrition
(d) Autotrophic nutrition
Ans. Parasitic nutrition
27. Photosynthesis is:
(a) Trapping energy of sunlight to form glucose.
(b) Synthesis of photosensitive compounds.
(c) Oxidation of glucose
(d) Oxidation of carbon dioxide
Ans. Trapping energy of sunlight to form glucose.
28. Which of the following statement(s) is (are) incorrect about the heart?
(i) Left ventricle pumps oxygenated blood to different body parts while the right ventricle pumps deoxygenated blood to the lungs.
(ii) Right atrium receives deoxygenated blood from different parts of the body while the left ventricle pumps oxygenated blood to different parts of the body.
(iii) Left atrium transfers oxygenated blood to the right ventricle which sends it to different body parts.
(iv) Left atrium receives oxygenated blood from different parts of the body while the right atrium receives deoxygenated blood from the lungs.
(a) (i) and (ii) statements are incorrect about the heart.
(b) (i) and (iii) statements are incorrect about the heart.
(c) (ii) and (iii) statements are incorrect about the heart.
(d) (iii) and (iv) statements are correct about the heart.
Ans. (iii) and (iv) statements are correct about the heart.
29. Arteries carry oxygenated blood. The only artery that carries deoxygenated blood is
(a) Carotid artery
(b) Pulmonary Artery
(c) Renal artery
(d) none of the above
Ans. Pulmonary Artery
30. Assertion (A): Villi are present on the internal wall of the intestine.
Reason (R): Villi absorb digested food
(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion.
(b) Both (A) and (R) are true, but (R) is not the correct explanation of the assertion.
(c) (A) is true, but (R) is false
(d) (A) is false, but (R) is true.
Ans. Both (A) and (R) are true and (R) is the correct explanation of the assertion.