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Vitamins and Coenzymes

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

tetrahydrofolic acid
dihydrofolic acid
trihydrofolic acid
hydrofolic acid

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Vitamins and Coenzymes
In the co-enzyme B12the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.

5-6 dimethylbenzimidazole
hydroxycobalamin
cyanocobalamin
adenine

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Vitamins and Coenzymes
Which of the following are reduced coenzymes?

ATP and GTP
Coenzyme A and ubiquinone
NADH and FADH2
NAD+ and FAD

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Vitamins and Coenzymes
Vitamins are essential because the organism

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

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

fatty acids
carbohydrates
amino acids
sugars

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

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

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