Exercise: Vitamins And Coenzymes

Questions for: Vitamins And Coenzymes

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+)
Answer: C
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In the co-enzyme B12the 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
Answer: A
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An example of a digestive hormone is
A:
lipase
B:
pepsin
C:
amylase
D:
gastrin
Answer: D
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Vitamin B12 is useful in the prevention and treatment of
A:
pernicious anemia
B:
scurvy
C:
cataract
D:
beri-beri
Answer: A
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Lipoic acid exists in
A:
oxidized form
B:
reduced form
C:
oxidized and reduced form both
D:
none of these
Answer: C
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