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Vitamins and Coenzymes

Vitamins and Coenzymes
Vitamin B12 is useful in the prevention and treatment of

cataract
pernicious anemia
scurvy
beri-beri

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

fishes
plants
micro-organisms
animals

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Vitamins and Coenzymes
Selenium is an essential component of the enzyme glutathione peroxidase which

scavenges toxic hydoperoxycompounds in tissues
oxidizes toxic hydoperoxycompounds in tissues
reduces toxic hydoperoxycompounds in tissues
None of these

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Vitamins and Coenzymes
The symptoms of retinol excess are

weakness
all of these
nausea
bone fragility

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Vitamins and Coenzymes
Ascorbic acid acts as an

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

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Vitamins and Coenzymes
Which of these is a vitamin A precursor?

Pyridoxine
Thiamine
Beta-Carotene
Cobalamin

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