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Vitamins and Coenzymes

Vitamins and Coenzymes
The symptoms of retinol excess are

weakness
bone fragility
all of these
nausea

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

pyrophosphate
pyridoxal phosphate
NAD+
ferredoxin

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Vitamins and Coenzymes
Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of

six isoprene units
four isoprene units
nine isoprene units
four isoprene units

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

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

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

keratinization
xeropthalmia
none of these
night blindness

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

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

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