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Vitamins and Coenzymes

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

pyrophosphate
pyridoxal phosphat
ferredoxin
FAD

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

Sulfhydryl group
Methyl group
Activated carbon dioxide (CO2)
Ammonia

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Vitamins and Coenzymes
The reductant, NADH, transfers the electrons via a flavo-proteins to the specific disulfide (S-S) protein to form a dithiol (SH,SH) protein which converts vitamin

B12(Co2+)to B12(Co)
B12(Co) to B12(Co2+)
B12(Co+)to B12(Co2+)
B12(Co2+)to B12(Co+)

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Vitamins and Coenzymes
β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by

none of these
plants and animals both
plants
animal

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Vitamins and Coenzymes
The absence of ascorbic acid in the human diet gives rise to

cataract
beri-beri
pernicious anemia
rickets

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Vitamins and Coenzymes
An early sign of retinol deficiencies in man is

night blindness
xeropthalmia
none of these
keratinization

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