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Vitamins and Coenzymes

Vitamins and Coenzymes
Which of the following are reduced coenzymes?

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

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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
four isoprene units
six isoprene units
nine isoprene units

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

xeropthalmia
none of these
night blindness
keratinization

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Vitamins and Coenzymes
A deficiency of niacin causes

cataract
pellagra
anemia
scurvy

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Vitamins and Coenzymes
A fat-soluble vitamin that regulates blood clotting is

niacin
vitamin C
vitamin A
vitamin K

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Vitamins and Coenzymes
In the co-enzyme B12the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.

5-6 dimethylbenzimidazole
hydroxycobalamin
cyanocobalamin
adenine

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