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Vitamins and Coenzymes

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

Zinc
Cobalt
Copper
Iron

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

Sulfhydryl group
Activated carbon dioxide (CO2)
Methyl group
Ammonia

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Vitamins and Coenzymes
Dihydroorotate dehydrogenase contains

2 flavins and 2 atoms of iron per molecule
4 flavins and 2 atoms of iron per molecule
4 flavins and 4 atoms of iron per molecule
2 flavins and 4 atoms of iron per molecule

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Vitamins and Coenzymes
The absence of ascorbic acid in the human diet gives rise to

pernicious anemia
cataract
rickets
beri-beri

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Vitamins and Coenzymes
Vitamin-D deficiency can cause

beri-beri
rickets
pernicious anemia
cataract

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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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