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Vitamins and Coenzymes

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

Paul Berg
Albert Szent-Gyorgyi
Linus Pauling
Kerry Mull is

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Vitamins and Coenzymes
Vitamin-C is considered as a

fat soluble
water soluble
none of these
fat and water soluble

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

keratinization
night blindness
xeropthalmia
none of these

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Vitamins and Coenzymes
Which of the following compounds/(s) belong/(s) to the vitamin B6 group?

Pyridoxine
Pyridoxal
Pyridoxamine
All of these

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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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Vitamins and Coenzymes
In one iron-metalloflavoprotein, the iron is present as a

flavin moiety
nonheme type
both (a) and (b)
heme-protein

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