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Vitamins and Coenzymes

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

Osteoporosis
Impaired taste perception
Impaired blood clotting
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
four isoprene units
four isoprene units
nine isoprene units

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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
5-6 dimethylbenzimidazole
hydroxycobalamin
adenine

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

keratinization
night blindness
xeropthalmia
none of these

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Vitamins and Coenzymes
Vitamins are essential because the organism

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

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Vitamins and Coenzymes
An example of a digestive hormone is

amylase
pepsin
gastrin
lipase

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