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Vitamins and Coenzymes

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

keratinization
none of these
xeropthalmia
night blindness

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Vitamins and Coenzymes
The symptoms of retinol excess are

all of these
weakness
bone fragility
nausea

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Vitamins and Coenzymes
The prosthetic group biotin is a carrier of which type of molecule?

Methyl group
Ammonia
Sulfhydryl group
Activated carbon dioxide (CO2)

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

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

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Vitamins and Coenzymes
Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of

nine isoprene units
four isoprene units
six isoprene units
four isoprene units

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Vitamins and Coenzymes
Main function of insulin hormone is to

decrease glycogen in liver
decrease blood sugar
increase glycogen in liver
increase blood sugar

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