31. Vitamin-D deficiency can cause
A. rickets
B. pernicious anemia
C. cataract
D. beri-beri
32. A deficiency of Vitamin K results in a decreased level of
A. prothrombin
B. thrombin
C. fibrin
D. fibrinogen
33. The vitamin riboflavin, which occurs as a yellow pigment in egg yolk and milk become
A. colorless on reduction with Zn in acid and regained its color on re-oxidation
B. colorless on oxidation and regained its color on reduction with Zn in acid
C. more deep in color on reduction with Zn in acid and regained its color on re-oxidation
D. more deep in color on oxidation and regained its color on reduction with Zn in acid
34. Which of the following compounds/(s) belong/(s) to the vitamin B6 group?
A. Pyridoxal
B. Pyridoxine
C. Pyridoxamine
D. All of these
35. What metal ion is specifically bound by vitamin B12?
A. Cobalt
B. Copper
C. Zinc
D. Iron