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Vitamins and Coenzymes

Vitamins and Coenzymes
Which of the following are reduced coenzymes?

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

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Vitamins and Coenzymes
Vitamin B12 (Cobalamin) is only synthesized by

micro-organisms
plants
fishes
animals

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Vitamins and Coenzymes
The prosthetic group biotin is a carrier of which type of molecule?

Activated carbon dioxide (CO2)
Methyl group
Sulfhydryl group
Ammonia

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Vitamins and Coenzymes
Vitamins are essential because the organism

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

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Vitamins and Coenzymes
Ascorbic acid acts as an

None of these
oxidizing agent
reducing agent
oxidizing and reducing agent both

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

pyridoxal phosphat
FAD
pyrophosphate
ferredoxin

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