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Vitamins and Coenzymes

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

ferredoxin
pyridoxal phosphate
NAD+
pyrophosphate

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

Beta-Carotene
Pyridoxine
Cobalamin
Thiamine

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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
An example of a digestive hormone is

amylase
gastrin
lipase
pepsin

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Vitamins and Coenzymes
Lipoic acid exists in

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

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Vitamins and Coenzymes
The symptoms of retinol excess are

nausea
weakness
all of these
bone fragility

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