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Vitamins and Coenzymes

Vitamins and Coenzymes
The absence of ascorbic acid in the human diet gives rise to

pernicious anemia
cataract
rickets
beri-beri

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Vitamins and Coenzymes
In one iron-metalloflavoprotein, the iron is present as a

flavin moiety
both (a) and (b)
nonheme type
heme-protein

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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

B12(Co2+)to B12(Co)
B12(Co+)to B12(Co2+)
B12(Co) to B12(Co2+)
B12(Co2+)to B12(Co+)

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Vitamins and Coenzymes
Ascorbic acid acts as an

oxidizing agent
oxidizing and reducing agent both
reducing agent
None of these

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Vitamins and Coenzymes
Vitamin B12 is useful in the prevention and treatment of

beri-beri
pernicious anemia
scurvy
cataract

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Vitamins and Coenzymes
The symptoms of retinol excess are

bone fragility
all of these
weakness
nausea

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