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Vitamins and Coenzymes

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

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

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Vitamins and Coenzymes
Which of these is a vitamin A precursor?

Pyridoxine
Cobalamin
Beta-Carotene
Thiamine

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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
What compound of raw egg white causes a syndrome similar to vitamin B deficiency?

Albumin
Ovalbumin
Avidin
Betabindin

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Vitamins and Coenzymes
Which of the following are reduced coenzymes?

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

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Vitamins and Coenzymes
Vitamin-C is considered as a

none of these
fat and water soluble
water soluble
fat soluble

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