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Vitamins and Coenzymes

Vitamins and Coenzymes
The symptoms of retinol excess are

weakness
all of these
bone fragility
nausea

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Vitamins and Coenzymes
Vitamins are essential because the organism

can't synthesize these compounds at all
None of these
can synthesize these compounds partially
can't synthesize these compounds in the adequate amounts

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

none of these
plants
plants and animals both
animal

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

Zinc
Iron
Copper
Cobalt

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

Pyridoxine
Cobalamin
Thiamine
Beta-Carotene

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Vitamins and Coenzymes
A deficiency of niacin causes

scurvy
pellagra
cataract
anemia

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