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Vitamins and Coenzymes

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

beri-beri
scurvy
cataract
pernicious anemia

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Vitamins and Coenzymes
A deficiency of niacin causes

pellagra
anemia
cataract
scurvy

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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
A fat-soluble vitamin that regulates blood clotting is

vitamin C
vitamin A
vitamin K
niacin

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Vitamins and Coenzymes
The occurrence of metals such as iron or molybdenum in some flavoproteins can

form chelation
de-stabilize the semiquinone
all of these
stabilize the semiquinone

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

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

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