VITAMINS AND COENZYMES QUIZ

Vitamin B12 (Cobalamin) is only synthesized by

fishes

plants

micro-organisms

animals

TRUE ANSWER : ?
YOUR ANSWER : ?

E.coli ACP has its molecular weight as around

19000

90,000

9000

39000

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following are reduced coenzymes?

Coenzyme A and ubiquinone

NAD+ and FAD

ATP and GTP

NADH and FADH2

TRUE ANSWER : ?
YOUR ANSWER : ?

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

nonheme type

flavin moiety

heme-protein

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these molecules is vitamin H?

Biotin

Folic acid

None of these

Carnitine

TRUE ANSWER : ?
YOUR ANSWER : ?

A fat-soluble vitamin that regulates blood clotting is

vitamin K

vitamin A

niacin

vitamin C

TRUE ANSWER : ?
YOUR ANSWER : ?

Selenium is an essential component of the enzyme glutathione peroxidase which

None of these

oxidizes toxic hydoperoxycompounds in tissues

reduces toxic hydoperoxycompounds in tissues

scavenges toxic hydoperoxycompounds in tissues

TRUE ANSWER : ?
YOUR ANSWER : ?

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

stabilize the semiquinone

de-stabilize the semiquinone

all of these

form chelation

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these is a vitamin A precursor?

Beta-Carotene

Thiamine

Cobalamin

Pyridoxine

TRUE ANSWER : ?
YOUR ANSWER : ?

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

rickets

pernicious anemia

beri-beri

cataract

TRUE ANSWER : ?
YOUR ANSWER : ?

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