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Vitamins and Coenzymes

Vitamins and Coenzymes
Vitamin-C is considered as a

water soluble
fat soluble
none of these
fat and water soluble

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Vitamins and Coenzymes
Which of the following are reduced coenzymes?

NAD+ and FAD
ATP and GTP
Coenzyme A and ubiquinone
NADH and FADH2

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Vitamins and Coenzymes
The disease Beriberi is due to a dietary deficiency in

vitamin B2 (riboflavin)
vitamin B6 (pyridoxine)
vitamin B1 (thiamine)
vitamin B12

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Vitamins and Coenzymes
Dihydroorotate dehydrogenase contains

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

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Vitamins and Coenzymes
Which of these molecules is vitamin H?

Biotin
Folic acid
Carnitine
None of these

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Vitamins and Coenzymes
In the co-enzyme B12the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.

cyanocobalamin
adenine
5-6 dimethylbenzimidazole
hydroxycobalamin

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