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Vitamins and Coenzymes

Vitamins and Coenzymes
Vitamin B12 (Cobalamin) is only synthesized by

micro-organisms
plants
animals
fishes

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Vitamins and Coenzymes
The symptoms of retinol excess are

weakness
nausea
bone fragility
all of these

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

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

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

trihydrofolic acid
tetrahydrofolic acid
dihydrofolic acid
hydrofolic acid

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Vitamins and Coenzymes
Dihydroorotate dehydrogenase contains

2 flavins and 4 atoms of iron per molecule
4 flavins and 2 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
Models of end-linked Osaka VI Fibrinogen dimers, a bilayer dimer is linked at

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

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