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Vitamins and Coenzymes

Vitamins and Coenzymes
Which of these molecules is vitamin H?

Carnitine
None of these
Folic acid
Biotin

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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
In one iron-metalloflavoprotein, the iron is present as a

heme-protein
both (a) and (b)
flavin moiety
nonheme type

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Vitamins and Coenzymes
The disease Beriberi is due to a dietary deficiency in

vitamin B6 (pyridoxine)
vitamin B12
vitamin B2 (riboflavin)
vitamin B1 (thiamine)

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Vitamins and Coenzymes
Vitamins are essential because the organism

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

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

pyrophosphate
pyridoxal phosphate
NAD+
ferredoxin

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