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Vitamins and Coenzymes

Vitamins and Coenzymes
Vitamin-D deficiency can cause

beri-beri
cataract
rickets
pernicious anemia

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

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

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

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Vitamins and Coenzymes
An example of a digestive hormone is

gastrin
lipase
amylase
pepsin

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Vitamins and Coenzymes
Vitamins are essential because the organism

can synthesize these compounds partially
can't synthesize these compounds at all
can't synthesize these compounds in the adequate amounts
None of these

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

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

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MORE MCQ ON Vitamins and Coenzymes

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