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Vitamins and Coenzymes

Vitamins and Coenzymes
The symptoms of retinol excess are

all of these
nausea
weakness
bone fragility

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

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

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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 metal ion is specifically bound by vitamin B12?

Cobalt
Iron
Zinc
Copper

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Vitamins and Coenzymes
Vitamin B12 is useful in the prevention and treatment of

beri-beri
scurvy
cataract
pernicious anemia

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Vitamins and Coenzymes
Main function of insulin hormone is to

increase glycogen in liver
decrease glycogen in liver
decrease blood sugar
increase blood sugar

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