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Vitamins and Coenzymes

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

Zinc
Cobalt
Copper
Iron

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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
Biotin occurs mainly in combined forms bound to protein through

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

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Vitamins and Coenzymes
Vitamin-D deficiency can cause

rickets
beri-beri
cataract
pernicious anemia

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

Thiamine
Beta-Carotene
Pyridoxine
Cobalamin

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Vitamins and Coenzymes
The most prominent role that tocopherol has in in-vitro systems is as a strong

all of these
oxidizing agent
antioxidants
reducing agent

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