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Vitamins and Coenzymes

Vitamins and Coenzymes
Ascorbic acid acts as an

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

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Vitamins and Coenzymes
The disease Beriberi is due to a dietary deficiency in

vitamin B6 (pyridoxine)
vitamin B12
vitamin B2 (riboflavin)
vitamin B1 (thiamine)

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

NAD+
pyrophosphate
ferredoxin
pyridoxal phosphate

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

beri-beri
anemia
scurvy
cataract

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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.

adenine
5-6 dimethylbenzimidazole
hydroxycobalamin
cyanocobalamin

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Vitamins and Coenzymes
An enzyme, L-folate reductase reduces folic acid to

dihydrofolic acid
tetrahydrofolic acid
trihydrofolic acid
hydrofolic acid

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