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Vitamins and Coenzymes

Vitamins and Coenzymes
A deficiency of niacin causes

anemia
cataract
scurvy
pellagra

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

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

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Vitamins and Coenzymes
Which of these molecules is vitamin H?

Carnitine
None of these
Biotin
Folic acid

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Vitamins and Coenzymes
An enzyme, L-folate reductase reduces folic acid to

trihydrofolic acid
tetrahydrofolic acid
hydrofolic acid
dihydrofolic acid

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Vitamins and Coenzymes
Biotin occurs mainly in combined forms bound to protein through

ε-N-lipoyl - L-lysine
ε-N-biotinyl-L-lysine
ε-N-lysine moiety
ε-S-lysine moiety

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

Zinc
Cobalt
Copper
Iron

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