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Vitamins and Coenzymes

Vitamins and Coenzymes
Lipoic acid exists in

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

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Vitamins and Coenzymes
The most prominent role that tocopherol has in in-vitro systems is as a strong

reducing agent
all of these
oxidizing agent
antioxidants

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

four isoprene units
six 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-S-lysine moiety
ε-N-lysine moiety
ε-N-biotinyl-L-lysine

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Vitamins and Coenzymes
The absence of ascorbic acid in the human diet gives rise to

cataract
beri-beri
pernicious anemia
rickets

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Vitamins and Coenzymes
The symptoms of retinol excess are

weakness
bone fragility
all of these
nausea

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