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THE BEST ACADEMY, UDYAVRA, CBSE 15 TERM TEST -2021, , SUB: SCIENCE DURATION: 40 mins, TOPIC: CH 6: Life Processes (MCQ) Total marks : 50, , Question 1.In which of the following group/ groups of animals, heart does not pump oxygenated blood, todifferent parts of the body?, , (a) Pisces only, , (b) Amphibians only, , (c) Amphibians and reptiles only, , (d) Pisces and amphibians, , Question 2.The filtration units of kidneys are called ~, (a) Ureter, , (b) Urethra, , (c) Neurons, , (d) Nephrons., , Question 3.Name the substances whose build up in the muscles during vigorous physical exercise may, causecramps?, , (a) Ethanol + Carbon dioxide + Energy, , (b) Lactic acid + Energy, , (c) Carbon dioxide + Water + Energy, , (d) Pyruvate, , Question 4.When air is blown from mouth into a test ~ tube containing lime water, the lime water turned, milkydue to presence of:, , (a) oxygen, , (b) nitrogen, , (c) water vapour, , (d) carbon dioxide, , Question 5.The mode of nutrition found in fungi is:, (a) Parasitic nutrition, , (b) Holozoic nutrition, , (c) Autotrophic nutrition, , (d) Saprotrophic nutrition, , Question 6.The site of photosynthesis in the cells of a leaf is, (a) chloroplast, , (b) mitochondria, , (c) cytoplasm, , (d) protoplasm, , Question 7.During contraction of heart, what prevents back flow of blood?, (a) Thin walls of atria, , (b) Thick muscular walls of ventricles, , (c) Valves in heart, , (d) All of the above
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Question 8.Woody plants carry gaseous exchange through, (a) root hair, , (b) stem hair, , (c) Lenticels, , (d) Epidermal cell, , Question 9.The contraction and expansion movement of the wvalls of the food pipe is called:, (a) translocation, , (b) transpiration, , (c) peristaltic movement, , (d) digestion, , Question 10.The process by which blood is cleared of metabolic wastes in case of kidney failure is called, (a) artificial kidney, , (b) dialysis, , (c) transplantation, , (d) filtration, , Question 11.Trachea do not collapse when there is not much air because they are:, (a) thick and muscular, , (b) having cartilaginous rings, , (c) have valves, , (d) Supported by larynx., , Question 12.Which of the following events in the mouth cavity will be affected if salivary amylase is, lacking inthe 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., , Question 13.Which region of the alimentary canal absorbs the digested foad?, (a) Stomach, , (b) Small intestine, , (c) Large intestine, , (d) Liver, , Question 14.Amoeba shows following kind of nutrition., (a) autotrophic, , (b) holozoic, , (c) Parasitic, , (d) saprotrophic, , Question 15.The exit of unabsorbed food material is regulated by, (a) liver, , (b) anus, , (c) small intestine, , (d) Anal sphincter, , Question 16.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
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Question 17.The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in, (a) cytoplasm, , (b) mitochondria, , (c) chloroplast, , (d) nucleus, , Question 18.Glycolysis process occurs in which part of the cell?, (a) Cytoplasm, , (b) Nucleus, , (c) Mitochondria, , (d) Chloroplast, , Question 19.The respiratory pigment in human beings is:, (a) carotene, , (b) chlorophyll, , (c) haemoglobin, , (d) Mitochondria, , Question 20.Name the pores in a leaf through which respiratory exchange of gases takes place., (a) Lenticels, , (b) Vacuoles, , (c) Xylem, , (d) Stomata, , Question 21.Name a circulatory fluid in the human body other than blood., , (a) Platelets, , (b) RBC, , (c) Lymph, , (d) plasma, , Question 22.A blood vessel which pumps the blood from the heart to the entire body:, (a) artery, , (b) capillary, , (c) Vein, , (d) Haemoglobin, , Question 23.Name the tube which connects the kidneys to the urinary bladder., (a) Urethra, , (b) Nephron, , (c) Tubule, , (d) Ureter, , Question 24.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, , Question 25.Which part of nephron allows the selective re absorption of useful substances like glucose,, aminoacids, salts and water into the blood capillaries?, , (a) Tubule, , (b) Glomerulus, , (c) Bowman's capsule, , (d) Ureter
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Question 26.The part of the digestive system where no digestion takes place is, (a) eum, , (b) stomach, , (c) mouth, , (d) esophagus, , Question 27.Normal blood pressure (systolic/diastolic) is, (a) 120/80 mm of Hg, (b) 160/80 mm of Hg, (c) 120/60 mm of Hg, (d) 180/80 mm of Hg, , Question 28.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, , Question 29,, , Assertion: All proteins in our food are digested in small intestine only., Reason: The protein digesting enzymes are released onto small intestine., (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) Ais true but R is false,, , (d) Ais false but R is true., , (e) Both A and R are false., , Question 30., Assertion: When air is passed through lime water, lime water turns milky., , Reason: Air contains 78% nitrogen and 21% oxygen., (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) Ais true but R is false., (d) Ais false but R is true., , Question 31., , Assertion: Human heart does not allow mixing of oxygen reach blood with carbon dioxide reachblood., Reason: Human heart has different chambers., , (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) Ais true but R is false., , (d) Ais false but R is true., , (e) Both A and R are false., , Question 32., , Assertion: Veins have thin walls to collect blood from different organs., Reason: Blood in veins are not under pressure., , (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) Ais true but R is false., , (d) Ais false but R is true., , (e) Both A and Rare false., , Question 33.Which plant tissue transports water and minerals from the roots to the leaf?, (a) Xylem, , (b) Phloem, , (c) Parenchyma, , (d) Collenchyma
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Question 34.Autotrophic organisms include, (a) bacteria and virus, , (b) bacteria and fungi, , (c) green plants and some bacteria, , (d) green plants and bacteria, , Question 35.The process in which loss of water takes place in the form of water vapour through stomata, iscalled, , a) transportation, , b) transpiration, , c) guttation, , d) translocation, , Question 36.A large quantity of one of the following is removed from our body by lungs:, (a) CO2 and H20, , (b) COz2 only, , (c) FLO only, , (d) ammonia, , Question 37.Blood pressure is measured by an instrument called, (a) barometer, , (b) sphygmomanometer, , (c) photometer, , (d) manometer., , Question 38.The autotrophic mode of nutrition requires, (a) carbon dioxide and water, , (b) chlorophyll, , (c) sunlight, , (d) all of the above, , Question 39.Which of the following are chiefly digested in the stomach?, (a) Carbohydrates, , (b) Proteins, , (c) Lipids, , (d) Fats, , Question 40.Large intestine in man mainly carries out, (a) absorption, , (b) assimilation, , (c) digestion of fats, , (d) absorption, , Question 41.Where is the dirty blood in our body filtered?, (a) Heart, , (b) Lungs, , (c) Ureter, , (d) Kidneys, , Question 42.The breakdown of pyruvate to give carbon dioxide, water and energy takes place in, (a) cytoplasm, , (b) mitochondria, , (c) chloroplast, , (d) nucleus
