VITAMINS AND COENZYMES QUIZ

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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In the co-enzyme B12the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.

hydroxycobalamin

5-6 dimethylbenzimidazole

cyanocobalamin

adenine

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The disease Beriberi is due to a dietary deficiency in

vitamin B2 (riboflavin)

vitamin B6 (pyridoxine)

vitamin B1 (thiamine)

vitamin B12

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Which of these is a symptom of vitamin A deficiency?

Osteoporosis

Blindness

Impaired blood clotting

Impaired taste perception

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Which of these is a vitamin A precursor?

Cobalamin

Thiamine

Pyridoxine

Beta-Carotene

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Vitamins are essential because the organism

can't synthesize these compounds in the adequate amounts

can't synthesize these compounds at all

None of these

can synthesize these compounds partially

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Vitamin B12 is useful in the prevention and treatment of

cataract

beri-beri

pernicious anemia

scurvy

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Vitamin-C is considered as a

fat and water soluble

water soluble

none of these

fat soluble

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The most prominent role that tocopherol has in in-vitro systems is as a strong

all of these

oxidizing agent

reducing agent

antioxidants

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Models of end-linked Osaka VI Fibrinogen dimers, a bilayer dimer is linked at

either end via two disulfide bonds

both ends by one disulfide bond

either end via a single disulfide bond

both ends by two disulfide bonds

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