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Vitamins and Coenzymes

Vitamins and Coenzymes
Which of the following compounds/(s) belong/(s) to the vitamin B6 group?

Pyridoxal
Pyridoxamine
Pyridoxine
All 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.

adenine
5-6 dimethylbenzimidazole
hydroxycobalamin
cyanocobalamin

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Vitamins and Coenzymes
The symptoms of retinol excess are

bone fragility
weakness
all of these
nausea

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Vitamins and Coenzymes
Ascorbic acid acts as an

oxidizing agent
None of these
oxidizing and reducing agent both
reducing agent

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Vitamins and Coenzymes
Vitamin-D deficiency can cause

pernicious anemia
beri-beri
cataract
rickets

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Vitamins and Coenzymes
Which of the following are reduced coenzymes?

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

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