VITAMINS AND COENZYMES QUIZ

What metal ion is specifically bound by vitamin B12?

Copper

Iron

Zinc

Cobalt

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β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by

plants and animals both

none of these

animal

plants

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What compound of raw egg white causes a syndrome similar to vitamin B deficiency?

Avidin

Albumin

Betabindin

Ovalbumin

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Ascorbic acid acts as an

oxidizing and reducing agent both

oxidizing agent

None of these

reducing agent

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The vitamin riboflavin, which occurs as a yellow pigment in egg yolk and milk become

colorless on reduction with Zn in acid and regained its color on re-oxidation

more deep in color on reduction with Zn in acid and regained its color on re-oxidation

colorless on oxidation and regained its color on reduction with Zn in acid

more deep in color on oxidation and regained its color on reduction with Zn in acid

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Vitamin-C is considered as a

none of these

fat and water soluble

fat soluble

water soluble

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

rickets

beri-beri

pernicious anemia

cataract

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The symptoms of retinol excess are

all of these

bone fragility

nausea

weakness

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Which of the following are reduced coenzymes?

Coenzyme A and ubiquinone

NAD+ and FAD

NADH and FADH2

ATP and GTP

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Which of the following compounds/(s) belong/(s) to the vitamin B6 group?

All of these

Pyridoxamine

Pyridoxal

Pyridoxine

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