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Vitamins and Coenzymes

Vitamins and Coenzymes
Which of these is a symptom of vitamin A deficiency?

Impaired taste perception
Impaired blood clotting
Blindness
Osteoporosis

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

tetrahydrofolic acid
hydrofolic acid
trihydrofolic acid
dihydrofolic acid

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Vitamins and Coenzymes
β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by

animal
plants
plants and animals both
none of these

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Vitamins and Coenzymes
The symptoms of retinol excess are

all of these
nausea
bone fragility
weakness

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Vitamins and Coenzymes
The vitamin riboflavin is part of the __________ molecule.

FAD
pyridoxal phosphat
ferredoxin
pyrophosphate

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