(a)  1 and 2
    (b)  2 and 3
    (c)  1 and 3
    (d)  3 only
Ans: (c)
61. Which of the following vitamins is synthesised in the body by intestinal bacteria?
    (a) Vitamin B1
    (b) Vitamin B4
    (c) Vitamin D
    (d) Vitamin K
Ans: (c)
62. Which acid is produced when milk gets sour? [CDS 1990]
    (a) Acetic acid
    (b) Tartaric acid
    (c) Lactic acid
    (d) Butyric acid
Ans: (c)
63. Which of the following vitamins can be synthesised by our body?
         1) Vitamin B6
         2) Vitamin D
         3) Vitamin E
         4) Vitamin K
    (a) 1 and 2
    (b) 2 and 3
    (c) 2 and 4
    (d) 1 and 4
Ans: (c)
64. Two richest known sources of edible protein are [IAS 1992]
    (a) meat and eggs
    (b) milk and vegetables
    (c) soyabean and groundnut
    (d) some algae and other micro- organisms
Ans: (c)
65. Which of the following are correctly matched?
         1) Haemoglobin - Transport protein
         2) Myosin and actin - Contractile proteins
         3) Collagen proteins - Structural
         4) Gammaglobulins - Protective proteins
    (a) 1, 2 and 4
    (b) 1, 3 and 4
    (c) 1, 2 and 3
    (d) 1, 2, 3 and 4
Ans: (d)
66. Which nutrients are most likely to be affected by food processing and storage?
    (a) Carbohydrates
    (b) Fats
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