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Vitamins and Coenzymes

Vitamins and Coenzymes
Ascorbic acid acts as an

oxidizing agent
reducing agent
None of these
oxidizing and reducing agent both

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Vitamins and Coenzymes
The symptoms of retinol excess are

weakness
bone fragility
nausea
all of these

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

pyridoxal phosphate
NAD+
pyrophosphate
ferredoxin

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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
Which of these is a vitamin A precursor?

Beta-Carotene
Pyridoxine
Cobalamin
Thiamine

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Vitamins and Coenzymes
A deficiency of thiamin produces the disease known as

beri-beri
scurvy
cataract
anemia

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