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Vitamins and Coenzymes

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

Cobalamin
Pyridoxine
Beta-Carotene
Thiamine

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Vitamins and Coenzymes
Selenium is an essential component of the enzyme glutathione peroxidase which

scavenges toxic hydoperoxycompounds in tissues
oxidizes toxic hydoperoxycompounds in tissues
reduces toxic hydoperoxycompounds in tissues
None of these

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Vitamins and Coenzymes
Which of these hormones is a catecholamine?

Tetrahydrofolate
Norepinephrine
Follitropin
Tetraiodothyronine

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

Zinc
Copper
Iron
Cobalt

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Vitamins and Coenzymes
Models of end-linked Osaka VI Fibrinogen dimers, a bilayer dimer is linked at

either end via a single disulfide bond
either end via two disulfide bonds
both ends by one disulfide bond
both ends by two disulfide bonds

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Vitamins and Coenzymes
A deficiency of thiamin produces the disease known as

cataract
beri-beri
scurvy
anemia

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