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Vitamins and Coenzymes

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

Albert Szent-Gyorgyi
Kerry Mull is
Paul Berg
Linus Pauling

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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
An enzyme, L-folate reductase reduces folic acid to

hydrofolic acid
tetrahydrofolic acid
trihydrofolic acid
dihydrofolic acid

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Vitamins and Coenzymes
Lipoic acid is a co-factor of the

both (a) and (b)
α-ketoglutaric dehydrogenase
pyruvic dehydrogenase
di-hydroorotate dehydrogenase

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

plants and animals both
animal
plants
none of these

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Vitamins and Coenzymes
A deficiency of niacin causes

anemia
scurvy
pellagra
cataract

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