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MCQs Chapter 6 Life Process, , 1. 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, , 2. In which mode of nutrition an organism de-rives 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, , 3. The mode of nutrition found in fungi is:, (a) Parasitic nutrition, (b) Holozoic nutrition, , (c) Autotrophic nutrition, , (d) Saprotrophic nutrition, Answer: d, , 4. 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, , 5. The site of photosynthesis in the cells of a leaf is, (a) chloroplast, , (b) mitochondria, (c) cytoplasm, , (d) protoplasm, Answer: a, , 6. In amoeba, food is digested in the:, (a) food vacuole, (b) mitochondria, (c) pseudopodia, (d) chloroplast, Answer: a, , 7. 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 acids and glycerol., Answer: a, , 8. Which region of the alimentary canal absorbs the digested food?, (a) Stomach, , (b) Small intestine, (c) Large intestine, (d) Liver
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Answer: b, , 9. 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, , 10. When a few drops of iodine solution are added to rice water, the solution turns blue- black in colour. This indicates, that rice water contains:, (a) fats, , (b) complex proteins, (c) starch, , (d) simple proteins, Answer: c, , 11. The exit of unabsorbed food material is regu-lated by, (a) liver, , (b) anus, , (c) small intestine, (d) anal sphincter, Answer: d, , 12. What are the products obtained by anaerobic respiration in plants?, (a) Lactic acid + Energy, , (b) Carbon dioxide + Water + Energy, , (c) Ethanol + Carbon dioxide + Energy, (d) Pyruvate, Answer: c, , 13. The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in, (a) cytoplasm, , (b) mitochondria, (c) chloroplast, (d) nucleus, Answer: b, , 14. Glycolysis process occurs in which part of the cell?, (a) Cytoplasm, (b) Nucleus, , (c) Mitochondria, (d) Chloroplast, Answer: a, , 15. 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, , 16. Name the pores in a leaf through which respi-ratory exchange of gases takes place., (a) Lenticels, , (b) Vacuoles
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(c) Xylem, , (d) Stomata, Answer: d, , 17. The respiratory pigment in human beings is:, (a) carotene, , (b) chlorophyll, , (c) haemoglobin, , (d) mitochondria, Answer: c, , 18. Which plant tissue transports water and min-erals from the roots to the leaf?, (a) Xylem, , (b) Phloem, , (c) Parenchyma, , (d) Collenchyma, Answer: a, , 19. The movement of food in phloem is called:, (a) transpiration, , (b) translocation, (c) respiration, , (d) evaporation, Answer: b, , 20. A blood vessel which pumps the blood from the heart to the entire body:, (a) artery, , (b) capillary, (c) Vein, , (d) Haemoglobin, Answer: a, , 21. Name a circulatory fluid in the human body other than blood., (a) Platelets, (b) RBC, , (c) Lymph, , (d) Plasma, Answer: c, , 22. Single circulation, i.e., blood flows through the heart only once during one cycle of passage through the body, is, exhibited by which of the following:, (a) hyla, rana, draco, , (b) whale, dolphin, turtle, , (c) labeo, chameleon, salamander, , (d) hippocampus, exocoetus, anabas, Answer: d, , 23. Name the tube which connects the kidneys to the urinary bladder., (a) Urethra, , (b) Nephron, (c) Tubule, (d) Ureter, , Answer: d, , 24. Which part of nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and, water into the blood capillaries?
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(a) Tubule, , (b) Glomerulus, , (c) Bowmanβs capsule, (d) Ureter, , Answer: a, , 25. Where is the dirty blood in our body filtered?, (a) Heart, , (b) Lungs, , (c) Ureter, , (d) Kidneys, Answer: d, , 26. The procedure used for cleaning the blood of a person by separating urea from it is called:, (a) osmosis, (b) filtration, (c) dialysis, , (d) double circulation, Answer: c, , 27. Which is the correct sequence of body parts in the human alimentary canal?, (a) Mouth β stomach β small intestine β large intestine β oesophagus, , (b) Mouth β oesophagus β stomach β small intestine β large intestine, (c) Mouth β stomach β oesophagus β smallintestine β large intestine, , (d) Mouth β oesophagus β stomach β large intestine β small intestine, Answer: b, , 28. Identify the correct path of urine in the human body., (a) Kidney β urinary bladder β urethra β ureter, (b) Urinary bladder β ureter β kidney β urethra, (c) Kidney β ureter β urethra β urinary bladder, , (d) Kidney β ureter β urinary bladder β urethra, Answer: d, , Fill in the Blanks, , 1. The exit of food from the stomach is regulated by a β¦β¦β¦. muscle., 2. β¦β¦β¦. is the longest part of the alimentary canal., , 3. The process of breakdown of glucose, (a six-carbon molecule) into pyruvate, (a three-carbon molecule), takes place, in the β¦β¦β¦. ., , 4. β¦β¦β¦. is the site of the complete digestion of carbohydrates, proteins and fats., 5. Breaking of pyruvate using oxygen takes place in the β¦β¦β¦. ., , 6. Rings of cartilage are present in the wind pipe to ensure that the β¦β¦β¦. ., , 7. The blood has β¦β¦β¦. cells which plug the leakage in the vessels by helping to clot the blood at the point of injury., 8. β¦β¦β¦. transports products of photosynthesis from the leaves to other parts of the plant., Answers, , 1. sphincter, , 2. Small intestine, 3. cytoplasm, , 4. Small intestine, 5. mitochondria, , 6. air-passage does not collapse, 7. platelet, , 8. phloem