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Vitamins and Coenzymes

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

fishes
animals
plants
micro-organisms

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Vitamins and Coenzymes
Biotin occurs mainly in combined forms bound to protein through

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

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

vitamin K
niacin
vitamin C
vitamin A

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Vitamins and Coenzymes
Which of these molecules is vitamin H?

Carnitine
Biotin
Folic acid
None of these

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Vitamins and Coenzymes
A deficiency of Vitamin K results in a decreased level of

thrombin
fibrinogen
fibrin
prothrombin

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Vitamins and Coenzymes
Dihydroorotate dehydrogenase contains

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

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