VITAMINS AND COENZYMES QUIZ

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

all of these

reducing agent

oxidizing agent

antioxidants

TRUE ANSWER : ?
YOUR ANSWER : ?

An enzyme, L-folate reductase reduces folic acid to

trihydrofolic acid

dihydrofolic acid

tetrahydrofolic acid

hydrofolic acid

TRUE ANSWER : ?
YOUR ANSWER : ?

Who discovered vitamin C (ascorbic acid)?

Albert Szent-Gyorgyi

Kerry Mull is

Linus Pauling

Paul Berg

TRUE ANSWER : ?
YOUR ANSWER : ?

What metal ion is specifically bound by vitamin B12?

Copper

Zinc

Cobalt

Iron

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following are reduced coenzymes?

ATP and GTP

NAD+ and FAD

NADH and FADH2

Coenzyme A and ubiquinone

TRUE ANSWER : ?
YOUR ANSWER : ?

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

form chelation

de-stabilize the semiquinone

stabilize the semiquinone

all of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Lipoic acid exists in

reduced form

oxidized and reduced form both

none of these

oxidized form

TRUE ANSWER : ?
YOUR ANSWER : ?

A fat-soluble vitamin that regulates blood clotting is

niacin

vitamin K

vitamin C

vitamin A

TRUE ANSWER : ?
YOUR ANSWER : ?

An early sign of retinol deficiencies in man is

night blindness

xeropthalmia

keratinization

none of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

either end via two disulfide bonds

either end via a single disulfide bond

both ends by two disulfide bonds

both ends by one disulfide bond

TRUE ANSWER : ?
YOUR ANSWER : ?

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