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Vitamins and Coenzymes

Vitamins and Coenzymes
Lipoic acid exists in

oxidized and reduced form both
oxidized form
none of these
reduced form

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

animal
plants
plants and animals both
none of these

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

Thiamine
Cobalamin
Pyridoxine
Beta-Carotene

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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
nine isoprene units
four isoprene units
six isoprene units

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

pyridoxal phosphate
pyrophosphate
ferredoxin
NAD+

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

amino acids
fatty acids
sugars
carbohydrates

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