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Vitamins and Coenzymes

Vitamins and Coenzymes
Lipoic acid exists in

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

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Vitamins and Coenzymes
Selenium is an essential component of the enzyme glutathione peroxidase which

None of these
reduces toxic hydoperoxycompounds in tissues
scavenges toxic hydoperoxycompounds in tissues
oxidizes toxic hydoperoxycompounds in tissues

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

Beta-Carotene
Pyridoxine
Thiamine
Cobalamin

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Vitamins and Coenzymes
Vitamins are essential because the organism

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

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

ferredoxin
pyrophosphate
pyridoxal phosphat
FAD

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Vitamins and Coenzymes
The absence of ascorbic acid in the human diet gives rise to

rickets
beri-beri
cataract
pernicious anemia

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