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PYQ 1200 Q/A Part - 1
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PYQ 1200 Q/A Part - 5
Kerala PSC General Science Book Study Materials Page 474
Book's First Page50. Tetrodotoxin is a potent poison that (a) erodes blood vessels (b) blocks conduction of nerve impulses causing respiratory paralysis (c) produces damage to the kidneys (d) produces intestinal bleeding Ans: (b) 51. Xerophthalmia is a deficiency disease. Deficiency of _________ causes it. (a) vitamin A (b) vitamin B (c) vitamin C (d) vitamin E Ans: (a) 52. Calcium and phosphorus assimilation will depend on sufficient intake of (a) vitamin B complex (b) vitamin D (c) vitamin A (d) vitamin C Ans: (b) 53. Vitamin D deficiency leads to (a) sterility (b) pellagra (c) rickets (d) capillary fragility Ans: (c) 54. Kwashiorkar is characterised by (a) dermatitis, changes in hair pigments and retarded brain growth (b) excretion of creatine in excess (c) tyrosinosis and alcaptonuria (d) None of these Ans: (a) 55. Kwashiorkar is a deficiency disease (a) due to poor intake of proteins (b) due to poor intake of carbohydrates (c) due to (a) and (b) (d) due to poor intake of lipids Ans: (a) 56. Modern classification of the living world recognise ___________ kingdoms. (a) two (b) three (c) four (d) five Ans: (d) 57. Pearl is secreted by the __________ of the pearl oyster. (a) foot (b) mantle (c) gills (d) None of these Ans: (b) 58. The country where commercial production of cultured pearls is undertaken on large scale is (a) India (b) Mexico (c) Netherlands (d) Japan Ans: (d) 59. Spiders can take only (a) solid food (b) liquid food (c) plant juice (d) flesh of dead animals Ans: (b) 60. Lizards, snakes, crocodiles and turtles belong to the class 473