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Vitamins and Coenzymes

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

keratinization
night blindness
none of these
xeropthalmia

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Vitamins and Coenzymes
Dihydroorotate dehydrogenase contains

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
2 flavins and 2 atoms of iron per molecule

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Vitamins and Coenzymes
An enzyme, L-folate reductase reduces folic acid to

tetrahydrofolic acid
hydrofolic acid
dihydrofolic acid
trihydrofolic acid

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Vitamins and Coenzymes
Main function of insulin hormone is to

decrease glycogen in liver
increase blood sugar
increase glycogen in liver
decrease blood sugar

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Vitamins and Coenzymes
Vitamins are essential because the organism

can synthesize these compounds partially
can't synthesize these compounds at all
None of these
can't synthesize these compounds in the adequate amounts

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Vitamins and Coenzymes
Lipoic acid is a co-factor of the

α-ketoglutaric dehydrogenase
pyruvic dehydrogenase
both (a) and (b)
di-hydroorotate dehydrogenase

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