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Vitamins and Coenzymes

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

night blindness
keratinization
none of these
xeropthalmia

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Vitamins and Coenzymes
Who discovered vitamin C (ascorbic acid)?

Kerry Mull is
Albert Szent-Gyorgyi
Linus Pauling
Paul Berg

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

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

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

pyrophosphate
pyridoxal phosphate
NAD+
ferredoxin

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Vitamins and Coenzymes
Vitamin-C is considered as a

fat soluble
none of these
fat and water soluble
water soluble

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

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