(b) 2 only
     (c) 3 only
     (d) 1 and 4
Ans: (a)
101. Salt is used in our food because :
     (a) it makes the food tasty
     (b) we sweat and lose salt
     (c) it helps in production of hydrochloric acid required to digest the food
     (d) it makes water absorb food particles better
Ans: (c)
102. The heart pumps blood to the pulmonary and aortic arches. For this to happen, the four chambers of the heart have to
     contract in a definite sequence. What is the sequence in which the contraction takes place?
           1) Left ventricle
           2) Right auricle
           3) Right ventricle
           4) Left auricle
     (a) 2, 4, 3, 1
     (b) 1, 3, 2, 4
     (c) 1, 4, 3, 2
     (d) 4, 2, 3, 1
Ans: (a)
103. Which of the following is/are true of enzymes?
           1) Proteinaceous in nature.
           2) Specific in nature.
           3) Converted in chemical reactions.
           4) Act on the substrate at any temperature.
     (a) 1 and 2
     (b) 1, 2 and 4
     (c) 1. 2 and 3
     (d) 2 and 4
Ans: (a)
104. Which of the following is/are true of bile?
           1) It is an enzyme secreted by the liver.
           2) It is a watery green fluid.
           3) It is stored in the gall bladder.
           4) It contains sodium chloride, sodium bicarbonate and complex organic compounds.
     (a) 1, 2 and 3
     (b) 2, 3 and 4
     (c) 1, 3 and 4
     (d) 3 and 4
Ans: (b)
105. The colour of bile pigments is largely derived from:
     (a) breakdown of haemoglobin from worn-out cells
     (b) bile salts
     (c) undigested food
     (d) xanthophylls
Ans: (a)
                                                              589