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Vitamins and Coenzymes

Vitamins and Coenzymes
An early sign of retinol deficiencies in man is

night blindness
none of these
xeropthalmia
keratinization

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Vitamins and Coenzymes
Lipoic acid exists in

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

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

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

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

Iron
Copper
Zinc
Cobalt

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Vitamins and Coenzymes
Vitamins are essential because the organism

can't synthesize these compounds at all
None of these
can synthesize these compounds partially
can't synthesize these compounds in the adequate amounts

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

beri-beri
scurvy
cataract
pernicious anemia

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