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Vitamins and Coenzymes

Vitamins and Coenzymes
Ascorbic acid acts as an

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

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

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

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Vitamins and Coenzymes
The prosthetic group biotin is a carrier of which type of molecule?

Methyl group
Activated carbon dioxide (CO2)
Sulfhydryl group
Ammonia

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Vitamins and Coenzymes
β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by

plants
plants and animals both
animal
none of these

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Vitamins and Coenzymes
Who discovered vitamin C (ascorbic acid)?

Paul Berg
Kerry Mull is
Linus Pauling
Albert Szent-Gyorgyi

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

Cobalt
Copper
Iron
Zinc

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