11. Lipoic acid exists in
A. oxidized form
B. reduced form
C. oxidized and reduced form both
D. none of these
12. Vitamin B12 is useful in the prevention and treatment of
A. pernicious anemia
B. scurvy
C. cataract
D. beri-beri
13. An example of a digestive hormone is
A. lipase
B. pepsin
C. amylase
D. gastrin
14. In the co-enzyme B12 the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.
A. adenine
B. 5-6 dimethylbenzimidazole
C. hydroxycobalamin
D. cyanocobalamin
15. The reductant, NADH, transfers the electrons via a flavo-proteins to the specific disulfide (S-S) protein to form a dithiol (SH,SH) protein which converts vitamin
A. B12(Co2+)to B12(Co)
B. B12(Co) to B12(Co2+)
C. B12(Co2+)to B12(Co+)
D. B12(Co+)to B12(Co2+)