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Vitamins and Coenzymes

Vitamins and Coenzymes
Which of these is a symptom of vitamin A deficiency?

Blindness
Impaired taste perception
Osteoporosis
Impaired blood clotting

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Vitamins and Coenzymes
Which of these hormones is a catecholamine?

Norepinephrine
Tetrahydrofolate
Tetraiodothyronine
Follitropin

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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
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
Biotin occurs mainly in combined forms bound to protein through

ε-N-biotinyl-L-lysine
ε-N-lysine moiety
ε-S-lysine moiety
ε-N-lipoyl - L-lysine

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Vitamins and Coenzymes
An early sign of retinol deficiencies in man is

none of these
keratinization
xeropthalmia
night blindness

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