Common Vitamins & Minerals Multiple Choice Questions And Answers

26. The daily dietary requirement of Vitamin B12 by an adult is
(a) 1–3 µg
(b) 50–100 µg
(c) 0.1–0.5 µg
(d) 1–3 µg
Ans: A

27. Which of the following factor(s) is/are required for the absorption of Vitamin B12 ingested in physiological amounts ?
(a) Gastric acid
(b) Gastric intrinsic factor
(c) Transcobalamine
(d) Both (a) and (b)
Ans: D

28. Hydroxocobalamine differs from cyanocobalamine in that
(a) It is more protein bound and better retained
(b) It is beneficial in tobacco amblyopia
(c) It benefits haematological but not neurological manifestations of Vit B12 deficiencey
(d) Both (a) and (b)
Ans: D

29. Megaloblastic anemia is caused by deficiency of
(a) Iron
(b) Vitamin B12
(c) Vitamin C
(d) All of the above
Ans: B

30. Vitamin B12 is a required co-factor for the following reaction
(a) Conversion of methylmalonyl-CoA to succinyl- CoA
(b) Conversion of 5-CH3-H4-folate to H4-folate
(c) Conversion of homocysteine to methionine
(d) All of the above
Ans: D

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