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Vitamins and Coenzymes

Vitamins and Coenzymes
What metal ion is specifically bound by vitamin B12?

Iron
Zinc
Copper
Cobalt

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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 absence of ascorbic acid in the human diet gives rise to

pernicious anemia
cataract
rickets
beri-beri

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Vitamins and Coenzymes
Which of the following are reduced coenzymes?

Coenzyme A and ubiquinone
ATP and GTP
NADH and FADH2
NAD+ and FAD

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Vitamins and Coenzymes
Vitamin-C is considered as a

water soluble
none of these
fat and water soluble
fat soluble

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Vitamins and Coenzymes
The vitamin niacin is part of the __________ molecule.

pyrophosphate
NAD+
pyridoxal phosphate
ferredoxin

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