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Vitamins and Coenzymes

Vitamins and Coenzymes
Vitamin-D deficiency can cause

rickets
pernicious anemia
cataract
beri-beri

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Vitamins and Coenzymes
A fat-soluble vitamin that regulates blood clotting is

niacin
vitamin A
vitamin C
vitamin K

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

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Vitamins and Coenzymes
Ascorbic acid acts as an

oxidizing and reducing agent both
oxidizing agent
reducing agent
None of these

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Vitamins and Coenzymes
The occurrence of metals such as iron or molybdenum in some flavoproteins can

all of these
de-stabilize the semiquinone
form chelation
stabilize the semiquinone

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

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

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