VITAMINS AND COENZYMES QUIZ

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

both ends by two disulfide bonds

both ends by one disulfide bond

either end via two disulfide bonds

either end via a single disulfide bond

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YOUR ANSWER : ?

An early sign of retinol deficiencies in man is

xeropthalmia

keratinization

none of these

night blindness

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Biotin occurs mainly in combined forms bound to protein through

ε-N-lysine moiety

ε-N-lipoyl - L-lysine

ε-S-lysine moiety

ε-N-biotinyl-L-lysine

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YOUR ANSWER : ?

Which of these is a vitamin A precursor?

Cobalamin

Thiamine

Pyridoxine

Beta-Carotene

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

nonheme type

heme-protein

both (a) and (b)

flavin moiety

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YOUR ANSWER : ?

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

Albumin

Betabindin

Avidin

Ovalbumin

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

form chelation

stabilize the semiquinone

all of these

de-stabilize the semiquinone

TRUE ANSWER : ?
YOUR ANSWER : ?

Vitamin-C is considered as a

water soluble

fat and water soluble

fat soluble

none of these

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Dihydroorotate dehydrogenase contains

4 flavins and 4 atoms of iron per molecule

4 flavins and 2 atoms of iron per molecule

2 flavins and 4 atoms of iron per molecule

2 flavins and 2 atoms of iron per molecule

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

cataract

pernicious anemia

rickets

beri-beri

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YOUR ANSWER : ?

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