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Vitamins and Coenzymes

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

Cobalamin
Beta-Carotene
Thiamine
Pyridoxine

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Vitamins and Coenzymes
Acyl carrier protein (ACP) plays an important role in the biosynthesis of

sugars
amino acids
carbohydrates
fatty acids

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Vitamins and Coenzymes
Vitamins are essential because the organism

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

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Vitamins and Coenzymes
Which of these molecules is vitamin H?

None of these
Folic acid
Biotin
Carnitine

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Vitamins and Coenzymes
The occurrence of metals such as iron or molybdenum in some flavoproteins can

form chelation
de-stabilize the semiquinone
stabilize the semiquinone
all of these

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

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

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