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Vitamins and Coenzymes

Vitamins and Coenzymes
The symptoms of retinol excess are

nausea
all of these
weakness
bone fragility

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

micro-organisms
fishes
animals
plants

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Vitamins and Coenzymes
An early sign of retinol deficiencies in man is

night blindness
none of these
keratinization
xeropthalmia

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

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

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Vitamins and Coenzymes
Dihydroorotate dehydrogenase contains

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

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Vitamins and Coenzymes
Vitamins are essential because the organism

can't synthesize these compounds at all
None of these
can't synthesize these compounds in the adequate amounts
can synthesize these compounds partially

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