Page 1 :
>> Multiple Choice Questions (MCQs) ‘\-——, , Life Processes, , >»>>>, , DIRECTIONS : This section contains multiple choice, questions. Each question has four choices (a), (b), (c) and (d), out of which only one is correct., , 1., , A pacemaker is meant for, , (a) transporting liver., , (b) transplanting heart., , (c) initiation of heart beats., (d)_ regulation of blood flow., , Root cap has no role in water absorption because:, , (a) It has no direct connection with the vascular system, (b)_Ithas no cells containing chloroplasts, , (c) It has no root hairs, , (d)_ Ithas loosely arranged cells,, , Veins can be differentiated from arteries because the, veins, , (a) have valves, , (b) have hard walls., , (c) have pure blood in them., , (d)_ have thick walls, , The function of the glomerulus and Bowman’s capsule of, the nephron is to, , (a) reabsorb water into the blood., , (b) eliminate ammonia from the body., , (c)_ reabsorb salts and amino acids., , (d) filter the blood and collect the filtrate., , An advantage of excreting nitrogenous wastes in the, , form of uric acid is that —, , (a) It is less toxic and reduces water loss and the, subsequent need for water., , (b) The formation of uric acid requires a great deal of, energy., , (c) Uric acid is the first metabolic breakdown products, of acids., , (d) Uric acid may be excreted through the lungs., , , , In the following sketch of stomatal apparatus, parts I, II,, III and IV were labelled differently by four students. The, correct labelling is:, , , , (a) I-guard cell, 1-stoma, III-starch granule, IV-nucleus, (b) I-cytoplasm II-nucleus, [II-stoma, [V-chloroplast, (c) I-guard cell, II-starch, I1-nucleus, IV-stoma, (d)_T-cytoplasm, Tl-chloroplast, ITI-stoma, IV-nucleus, , The correct order of air reaching from atmosphere to the, lungs is through, , (a) external nares, larynx, trachea and air sac., , (b) larynx, trachea, air sac and external nares., , (c) trachea, air sac, external nares and larynx., , (d) air sac, trachea, larynx and external nares., , ‘The rate at which oxygen moves from the alveoli of our, lungs into our blood, , (a) depends on the difference in oxygen concentration, between the alveoli and the blood., , (b) depends on the color of the alveoli., , (c) depends on the availability of energy to transport, gases across the membrane, , (d)_ none of the above, , Major function of contractile vacuole is, , (a) Excretion (b) Circulation, (c) Osmoregulation (d) All of these, Heart beat can be initiated by, , (a) Sino-auricular node, , (b) Atrio-ventricular node, , (c) Sodium ion, , (a) Purkinje’s fibres

Page 2 :
Life Processes, , 12., , 13., , 14,, , 15., , 16., , 17., , 18., , 19,, , 20., , Digestion of food in human starts from 21., (a) Duodenum (b) Small intestine, (©) Mouth (d) Large intestine, , Large intestine in man mainly carries out, (a) absorption, , (b) assimilation, , (c)_ digestion of fats, , (d) digestion of carbohydrates 22., In Amoeba the digestion is intracellular because, , (a) Amoeba is unicellular, , (b) Amoeba is multicellular, , (c) Amoeba is found in a pond, , (d) Amoeba is a microscopic animal 23., ‘The process of transpiration in plants helps in:, , (a) Opening of stomata, , (b) Absorption of CO, from atmosphere, , (c) Upward conduction of water and minerals, , (d)_ Absorption of O, from atmosphere., , Erythropoesis may be stimulated by the deficiency of, (a) Iron (b) Oxygen, , (c) Protein (d) None of these, , In the cardiac cycle, diastole is —, , (a) The number of heart beats per minute, , (b) The relaxation period after contraction of the heart, (©) The forceful pumping action of the heart, , (d) The contraction period after relaxation of the heart., , 24,, , The breakdown of pyruvate to give carbon dioxide, water, and energy takes place in, (a) cytoplasm, , (c) chloroplast, , (b) mitochondria, , (d) nucleus, , What is the term used when vessels open and let more, blood through?, , (a) Vasoconstriction, , (b) Vasodilatation 28., (c) Increased permeability, , (d@)_ None of these, , ‘The chief fiction of lymph nodes in mammalian body is to, (a) produce RBCs, , (b) collect and destroy pathogens, , (c) produce a hormone, , (d) destroy the old and worn out red blood cells, , 26., , Select the correct statement?, , (a) Heterotrophs do not synthesise their own food., , (b) Heterotrophs utilise solar energy for photosynthesis., , (c)_ Heterotrophs synthesise their own food., , (d) Heterotrophs are capable of converting carbon, dioxide and water into carbohydrates., , In respiration, ait passes through, (a) Pharynx — nasal cavity — larynx — trachea >, bronchi — bronchioles, , Nasal cavity > pharynx — larynx > trachea >, bronchi — bronchioles, , (b), , (©), (d), During deficiency of oxygen in tissues of human beings,, pyruvic acid is converted into lactic acid in the, , (a) cytoplasm (b) chloroplast, , (c)_ mitochondria (d) golgi body, , Larynx — nasal cavity > pharynx — trachea, Larynx — pharynx — trachea > lungs, , Choose the function of the pancreatic juice from the, following?, , (a) Trypsin digests proteins and lipase digests, carbohydrates, , Trypsin digests emulsified fats and lipase proteins., Trypsin and lipase digest fats., , Trypsin digests proteins and lipase emulsify fats., , (b), (©), ), 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., , 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., , (b), , (c) They have thick elastic walls, blood flows under, low pressure, carry blood from the heart to various, organs of the body., , They have thick elastic walls without valves inside,, blood flows under high pressure and carry blood, , away from the heart to different parts of the body., , qd), , Pseudopodia, , , , Which activity is illustrated in the diagram of an Amoeba, shown above?, , (a) Ingestion, (c) Egestion, , (b) Digestion, (d) Assimilation, From the given picture of the, digestive system, identify the part, labelled as gastric gland., , (a) A, , (b) B, , () C, , (@ D

Page 3 :
27., , 28., , 29,, , 30., , 31., , 32., , The diagram below represents a group of organs in the, human body. Urine leaves the urinary bladder by passing, through this structure labelled, , A, B, c, D, (a) A (b) B, () C @ D, , 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 HI, of the leaf parts labelled 1, IT and I, Ill will become black when, , dipped in iodine solution?, , , , (a) Tonly, (c) Land It, , (b) only, (d) Wand I, , The phenomenon of normal breathing in a human being, comprises., , (a) an active inspiratory and a passive expiratory phase., (b) a passive inspiratory and an active expiratory phase, (c) both active inspiratory and expiratory phases., , (d) both passive inspiratory and expiratory phases., , Filteration unit of kidney is, (a) ureter, (c) neuron, , (b) urethra, (d) nephron, , Acolumn of water within xylem vessels of tall trees does, not break under its weight because of:, , (a) Tensile strength of water, , (b) Lignification of xylem vessels, , (c) Positive root pressure, , (d) Dissolved sugars in water, , Roots play insignificant role in absorption of water in:, (a) Pistia (b) Pea, (c) Wheat (d) Sunflower, , Which of the following statements is not correct?, , (a) Goblet cells are present in the mucosa of intestine, and secrete mucus., , Oxyntic cells are present in the mucosa of stomach, and secrete HCl., , Acini are present in the pancreas and secrete, carboxypeptidase., , (b), ©, , 34,, , 35., , 36., , 37., , 39,, , Science, , (d) Brunner’s glands are present in the submucosa of, stomach and secrete pepsinogen., , Human urine is usually acidic because, , (a) excreted plasma proteins are acidic., , (b) potassium and sodium exchange generates acidity., , (©), , (d), , hydrogen ions are actively secreted into the filtrate., , the sodium transporter exchanges one hydrogen ion, for each sodium ion in peritubular capillaries,, , Which one of the following animals has two separate, circulatory pathways?, (a) Lizard, (c) Shark, , (b) Whale, (d) Frog, , Cow has a special stomach as compared to that of a lion, in order to, , (a) absorb food in better manner., , (b) digest cellulose present in the food, , (c)_ assimilate food in a better way., , (d) absorb large amount of water., , Which of the following is not an enzyme?, (b) Amylase, (d) Bilirubin, , (a) Lipase, (c)_ Trypsin, Pancreatic juice contains more than one enzyme. Which, among the following combination is correct?, , (a) Pepsin and Lipase, , (b) Amylase and Pepsin, , (c) Pepsin and Trypsin, , (d) Trypsin and Lipase, , Observe the experimental sets [A] & [B]., , Observe the test tube A & B. From the list given below,, choose the combination of responses of shoot and root, that are observed in B., , @), , , , (a) Positive phototropism and positive geotropism, (b) Negative phototropism and positive geotropism, (c) Positive phototropism and negative geotropism, (d) Only negative phototropism

Page 4 :
Life Processes, , 40., , 41., , 42., , 43., , 44,, , 45,, , 46., , 47,, , 48., , Which one of the following organisms respires through, the skin?, , (a) Blue whale, (c) Platypus, , (b) Salamander, (d) Peacock, , The first enzyme that the food encounters in human, digestive system is, (a) Pepsin, , (c) Chymotrypsin, Red blood corpuscles are formed in, , (a) Liver (b) Kidneys, , (c) Small intestine (d) Bone marrow, , (b) Trypsin, (4) Amylase, , The Excretory units of Annelids are:, (a) Uniferous tubule (b) Flame cells, , (c) Nephridia (d) Malpighian tubule, Open circulatory system is found in:, , (a) Prawn (b) Snakes, , (c) Fish (d) Man, Haemoglobin is dissolved in Plasma of blood in:, , (a) Earthworm, (©) Tapeworm, , (b) Roundworm, (d) Insects, , Which one of the following organisms has a cellular, respiratory pigment dissolved in plasma and is also a, predaceous carnivore and shows matriphagy?, , (a) Scorpion (b) Cockroach, , (c) Earthworm (d) Sea cucumber, , Glucose is the prime source of energy in our body., However, it is stored in the form of glycogen in the, muscle and liver of animals and in the form of starch in, plants. As a result, everytime a cell requires glucose, it, must hydrolyze glycogen which is an energy consuming, process. Why does the cell store glycogen instead of, glucose in free form?, (a) Glycogen is more compact and more hydrophilic., (b) Storage of glucose in free form will consume more ATP., (c) Glucose in the free form creates more osmotic pressure., (a) Glucose is highly reactive molecule hence storing in, the free form can result in unwanted reactions in the, cells., , A squirrel was eating a fruit on the ground, Suddenly, it, was attacked by a dog. The squirrel rushed to the tree, immediately and saved itself from the dangerous attack., What immediate changes are most likely to have taken, place in the body of the squirrel?, , ‘A. Blood flows to the stomach for rapid digestion, , 49., , 50., , 51., , 52., , 53., , 54,, , 55., , B. Adrenaline was secreted in the blood by the adrenal, glands,, , C. Heart beat becomes faster and pumps more blood so, that muscles get more oxygen., , D. Adrenocorticotropic hormone is secreted in the, blood and blood flows more towards the vital organs., , Select the correct combination of options given below:, , (a) AandB (b) AandC, , (c) BandC (@) CandD, , Removal of the pancreas impairs the breakdown of, (a) lipids and carbohydrates only, , (b) lipids and proteins only, , (c) lipids, proteins and carbohydrates, , (d) proteins and carbohydrates only, , Microscopic examination of a blood smear reveals an, abnormal increase in the number of granular cells with, multiple nuclear lobes. Which one of the following cell, ‘Types has increased in number?, , (a) Lymphocytes (b) Monocytes, , (c) Neutrophils (d) Thrombocytes, , Which one of the following metabolic conversions, requires oxygen?, , (a) Glucose to pyruvate, , (b) Glucose to CO, and ethanol, , (c) Glucose to lactate, , (a) Glucose to CO, and H,O, , Which one of the following organs is NOT a site for the, production of white blood cells?, , (b) Kidney, , (d) Spleen, , (a) Bone marrow, (c) Liver, , Which of the following process occur only in animals?, (b) Nutrition, , (d) Hormonal control, , (a) Respiration, (c)_ Nervous control, , Tricuspid valve is present in, (a) Right atria and right ventricle, , (b) Left atria and left ventricle, , (c) Wall of atrium, , (d) Wall of vetricle, , Root pressure is effective way transporting water in, xylem. This pressure is generated, , (a) In bright sunlight, , (b) During night, , (©) Atvery low temperature, , (d) In high trees

Page 5 :
>> Case/Passage Based Questions N\: >»»>, DIRECTIONS : Study the given case/passage and answer the, following questions., , Case/Passage - 1, , There is a pair of bean-shaped organs P in the human body, towards the back, just above the waist. A waste product Q, formed by the decomposition of unused proteins in the liver, is brought into organ P through blood by an artery R. The, numerous tiny filters S present in organ P clean the dirty blood, by removing the waste product Q. The clean blood goes into, circulation through a vein T. The waste substance Q, other, waste salts, and excess water form a yellowish liquid U which, goes from organ P into a bag-like structure V through two, tubes W. This liquid is then thrown out of the body through a, tube X., , 56., 57., 58., 59., , What is (i) organ P, and (ii) waste substance Q?, Name (i) artery R, and (i/) vein T., What are tiny filters S known as?, Name (i) liquid U (ii) structure V (iii) tubes W, and (iv), tube X., Case/Passage - 2, , All living cells require energy for various activities. This, energy is available by the breakdown of simple carbohydrates., either using oxygen or without using oxygen., , 60. Energy in the case of higher plants and animals is obtained, by, (a) Breathing (b) Tissue respiration, (c) Organ respiration (d) Digestion of food, , 61. The graph below represents the blood lactic acid, , concentration of an athlete during a race of 400 m and, shows a peak at point D., , Lactic acid production has occurred in the athlete while, running in the 400 m race., , Respiration in athletics, The blood of an athlete was tested before, during and, after a 400m race:, , cid concentration, , , , 30, ‘Time in seconds, , 62., , 63., , 64,, , Science, , Lactic acid production has occurred in the athlete while, running in the 400 m race. Which of the following, processes explains this event?, , Which of the following processes explains this event?, (a) Aerobic respiration (b) Anaerobic respiration, , (c) Fermentation (d) Breathing, , Study the graph below that represents the amount of, energy supplied with respect to the time while an athlete, is running at full speed., , Choose the correct combination of plots and justification, provided in the following table., , , , Plot A Plot B Justification, , , , (a) | Aerobic Anaerobic | Amount of energy is, low and inconsistent, in aerobic and high, , in anaerobic, , , , (b) | Aerobic Anaerobic | Amount of energy is, high and consistent, in aerobic and low, , in anaerobic, , , , (c) | Anaerobic | Aerobic Amount of energy is, high and consistent, in aerobic and low, , in anaerobic, , , , , , Anaerobic | Aerobic, , (d) Amount of energy is, high and inconsistent, in anaerobic and low, , in aerobic, , , , , , , , , , , , The characteristic processes observed in anaerobic, respiration are:, , (i) presence of oxygen, , (ii) release of carbon dioxide, , (iii) release of energy, (iv) release of lactic acid, (a) (i), Gi) only, , (c) (ii), iii), iv) only, , (b) (i), (id), Gii) only, (d) (iv) only, , Study the table below and select the row that has the, incorrect information., , Aerobic Anaerobic, (a) Location Cytoplasm Mitochondria, (b) End Porduct CO, and H,O — Ethanol and, co,, (c) Amount of ATP High Low, (@ Oxygen Needed Not needed