VITAMINS AND COENZYMES QUIZ

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

Pyridoxine

Pyridoxal

All of these

Pyridoxamine

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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.

adenine

5-6 dimethylbenzimidazole

cyanocobalamin

hydroxycobalamin

TRUE ANSWER : ?
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Lipoic acid is a co-factor of the

α-ketoglutaric dehydrogenase

di-hydroorotate dehydrogenase

both (a) and (b)

pyruvic dehydrogenase

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In one iron-metalloflavoprotein, the iron is present as a

flavin moiety

both (a) and (b)

heme-protein

nonheme type

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E.coli ACP has its molecular weight as around

9000

90,000

19000

39000

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Who discovered vitamin C (ascorbic acid)?

Linus Pauling

Paul Berg

Albert Szent-Gyorgyi

Kerry Mull is

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Vitamins are essential because the organism

can't synthesize these compounds at all

can't synthesize these compounds in the adequate amounts

can synthesize these compounds partially

None of these

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Main function of insulin hormone is to

decrease glycogen in liver

increase blood sugar

increase glycogen in liver

decrease blood sugar

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Acyl carrier protein (ACP) plays an important role in the biosynthesis of

carbohydrates

amino acids

fatty acids

sugars

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Dihydroorotate dehydrogenase contains

2 flavins and 2 atoms of iron per molecule

4 flavins and 4 atoms of iron per molecule

2 flavins and 4 atoms of iron per molecule

4 flavins and 2 atoms of iron per molecule

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