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Vitamins and Coenzymes

Vitamins and Coenzymes
Lipoic acid exists in

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

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Vitamins and Coenzymes
The disease Beriberi is due to a dietary deficiency in

vitamin B12
vitamin B1 (thiamine)
vitamin B2 (riboflavin)
vitamin B6 (pyridoxine)

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Vitamins and Coenzymes
A fat-soluble vitamin that regulates blood clotting is

vitamin C
niacin
vitamin A
vitamin K

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Vitamins and Coenzymes
Biotin occurs mainly in combined forms bound to protein through

ε-S-lysine moiety
ε-N-lipoyl - L-lysine
ε-N-lysine moiety
ε-N-biotinyl-L-lysine

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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
The vitamin niacin is part of the __________ molecule.

pyrophosphate
pyridoxal phosphate
ferredoxin
NAD+

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