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Vitamins and Coenzymes

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

animals
fishes
micro-organisms
plants

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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
Acyl carrier protein (ACP) plays an important role in the biosynthesis of

sugars
fatty acids
amino acids
carbohydrates

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Vitamins and Coenzymes
Which of these is a vitamin A precursor?

Thiamine
Pyridoxine
Beta-Carotene
Cobalamin

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

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

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Vitamins and Coenzymes
What metal ion is specifically bound by vitamin B12?

Copper
Zinc
Iron
Cobalt

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