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Vitamins and Coenzymes

Vitamins and Coenzymes
Ascorbic acid acts as an

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

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Vitamins and Coenzymes
The prosthetic group biotin is a carrier of which type of molecule?

Ammonia
Methyl group
Sulfhydryl group
Activated carbon dioxide (CO2)

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

Thiamine
Pyridoxine
Cobalamin
Beta-Carotene

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Vitamins and Coenzymes
Which of these hormones is a catecholamine?

Follitropin
Norepinephrine
Tetraiodothyronine
Tetrahydrofolate

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Vitamins and Coenzymes
A deficiency of niacin causes

anemia
cataract
scurvy
pellagra

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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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