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Vitamins and Coenzymes

Vitamins and Coenzymes
The prosthetic group biotin is a carrier of which type of molecule?

Ammonia
Sulfhydryl group
Activated carbon dioxide (CO2)
Methyl group

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

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

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Vitamins and Coenzymes
Lipoic acid is a co-factor of the

α-ketoglutaric dehydrogenase
pyruvic dehydrogenase
both (a) and (b)
di-hydroorotate dehydrogenase

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Vitamins and Coenzymes
The most prominent role that tocopherol has in in-vitro systems is as a strong

antioxidants
all of these
oxidizing agent
reducing agent

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Vitamins and Coenzymes
Vitamin-D deficiency can cause

beri-beri
rickets
pernicious anemia
cataract

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Vitamins and Coenzymes
Lipoic acid exists in

none of these
reduced form
oxidized form
oxidized and reduced form both

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