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Vitamins and Coenzymes

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

pyridoxal phosphate
NAD+
ferredoxin
pyrophosphate

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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
hydroxycobalamin
cyanocobalamin
5-6 dimethylbenzimidazole

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Vitamins and Coenzymes
Vitamin B12 (Cobalamin) is only synthesized by

animals
micro-organisms
plants
fishes

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Vitamins and Coenzymes
Ascorbic acid acts as an

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

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Vitamins and Coenzymes
Lipoic acid is a co-factor of the

α-ketoglutaric dehydrogenase
di-hydroorotate dehydrogenase
both (a) and (b)
pyruvic dehydrogenase

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Vitamins and Coenzymes
What compound of raw egg white causes a syndrome similar to vitamin B deficiency?

Albumin
Betabindin
Ovalbumin
Avidin

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