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Vitamins and Coenzymes

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

Thiamine
Beta-Carotene
Pyridoxine
Cobalamin

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Vitamins and Coenzymes
Which of these hormones is a catecholamine?

Follitropin
Norepinephrine
Tetrahydrofolate
Tetraiodothyronine

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Vitamins and Coenzymes
β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by

animal
plants
none of these
plants and animals both

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

vitamin A
vitamin C
vitamin K
niacin

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Vitamins and Coenzymes
E.coli ACP has its molecular weight as around

39000
90,000
9000
19000

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

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

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