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Vitamins and Coenzymes

Vitamins and Coenzymes
Which of the following compounds/(s) belong/(s) to the vitamin B6 group?

Pyridoxamine
Pyridoxine
All of these
Pyridoxal

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

Activated carbon dioxide (CO2)
Methyl group
Ammonia
Sulfhydryl group

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Vitamins and Coenzymes
Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of

four isoprene units
four isoprene units
six isoprene units
nine isoprene units

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

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

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

pernicious anemia
scurvy
beri-beri
cataract

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Vitamins and Coenzymes
What metal ion is specifically bound by vitamin B12?

Iron
Zinc
Cobalt
Copper

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