Life Process MCQs
31. Which of the following are chiefly digested in the stomach?
(a) Carbohydrates
(b) Proteins
(c) Lipids
(d) Fats
Answer
Answer: b
32. From the given picture of the digestive system, identify the part labelled as gastric gland.
(a) A
(b) B
(c) C
(d) D
Answer
Answer: b
33. Large intestine in man mainly carries out
(a) absorption
(b) assimilation
(c) digestion of fats
(d) digestion of carbohydrates
Answer
Answer: a
34. The part of the digestive system where no digestion takes place is
(a) ileum
(b) stomach
(c) mouth
(d) oesophagus
Answer
Answer: d
35. The fermentation of glucose by yeast normally yields
(a) alcohol, CO2 and 36 ATP
(b) CO2, H20 and 36 ATP
(c) alcohol, CO2 and 2ATP
(d) lactic acid, CO7 and 2 ATP
Answer
Answer: d
36. A large quantity of one of the following is removed from our body by lungs:
(a) CO2 and H20
(b) CO2 only
(c) FLO only
(d) ammonia
Answer
Answer: a
37. 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
Answer
Answer: b
38. A biochemical compound that readily combines with oxygen and distributes it throughout the human body is
(a) water
(b) urea
(c) haemoglobin
(d) acetylcholine
Answer
Answer: c
39. The process in which loss of water takes place in the form of water vapour through stomata is called
(a) transportation
(b) transpiration
(c) guttation
(d) translocation
Answer
Answer: b
40. In a closed circulatory system, blood is completely enclosed within
(a) vessels
(b) heart
(c) skeleton
(d) sinuses
Answer
Answer: b
41. 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
Answer
Answer: a
42. Blood pressure is measured by an instrument called
(a) barometer
(b) sphygmomanometer
(c) photometer
(d) manometer
Answer
Answer: b
43. Which of the following statements is not correct?
(a) Deoxygenated blood is poured into right atrium of heart.
(b) The excretory units of flatworms are flame cells.
(c) Human kidney has about 1 million nephridia
(d) Tracheids and vessels are non-living conducting tissues.
Answer
Answer: c
44. Which part of alimentary canal receives bile from the liver? [NCERT Exemplar Problems]
(a) Stomach
(b) Small intestine
(c) Large intestine
(d) Oesophagus
Answer
Answer: b
45. When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of [NCERT Exemplar Problems]
(a) oxygen
(b) carbon dioxide
(c) nitrogen
(d) water vapour
Answer
Answer: b