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Vitamins and Coenzymes

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

none of these
keratinization
xeropthalmia
night blindness

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

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

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

Sulfhydryl group
Ammonia
Activated carbon dioxide (CO2)
Methyl group

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Vitamins and Coenzymes
The absence of ascorbic acid in the human diet gives rise to

pernicious anemia
rickets
beri-beri
cataract

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Vitamins and Coenzymes
E.coli ACP has its molecular weight as around

39000
90,000
9000
19000

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Vitamins and Coenzymes
The occurrence of metals such as iron or molybdenum in some flavoproteins can

all of these
form chelation
de-stabilize the semiquinone
stabilize the semiquinone

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