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Vitamins and Coenzymes

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
A deficiency of Vitamin K results in a decreased level of

fibrin
prothrombin
fibrinogen
thrombin

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

Methyl group
Sulfhydryl group
Ammonia
Activated carbon dioxide (CO2)

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

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

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Vitamins and Coenzymes
In the co-enzyme B12the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.

cyanocobalamin
5-6 dimethylbenzimidazole
adenine
hydroxycobalamin

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Vitamins and Coenzymes
Which of these hormones is a catecholamine?

Tetrahydrofolate
Tetraiodothyronine
Follitropin
Norepinephrine

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