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Vitamins and Coenzymes

Vitamins and Coenzymes
A fat-soluble vitamin that regulates blood clotting is

vitamin C
niacin
vitamin A
vitamin K

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Vitamins and Coenzymes
Dihydroorotate dehydrogenase contains

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

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Vitamins and Coenzymes
The occurrence of metals such as iron or molybdenum in some flavoproteins can

stabilize the semiquinone
de-stabilize the semiquinone
form chelation
all of these

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Vitamins and Coenzymes
Lipoic acid exists in

reduced form
none of these
oxidized and reduced form both
oxidized form

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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
Acyl carrier protein (ACP) plays an important role in the biosynthesis of

fatty acids
carbohydrates
sugars
amino acids

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