VITAMINS AND COENZYMES QUIZ

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 : ?

Lipoic acid exists in

oxidized and reduced form both

oxidized form

reduced form

none of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Biotin occurs mainly in combined forms bound to protein through

ε-N-biotinyl-L-lysine

ε-S-lysine moiety

ε-N-lipoyl - L-lysine

ε-N-lysine moiety

TRUE ANSWER : ?
YOUR ANSWER : ?

A deficiency of Vitamin K results in a decreased level of

fibrin

fibrinogen

thrombin

prothrombin

TRUE ANSWER : ?
YOUR ANSWER : ?

The symptoms of retinol excess are

nausea

weakness

bone fragility

all of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Who discovered vitamin C (ascorbic acid)?

Paul Berg

Linus Pauling

Kerry Mull is

Albert Szent-Gyorgyi

TRUE ANSWER : ?
YOUR ANSWER : ?

Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of

six isoprene units

nine isoprene units

four isoprene units

four isoprene units

TRUE ANSWER : ?
YOUR ANSWER : ?

A fat-soluble vitamin that regulates blood clotting is

vitamin C

niacin

vitamin A

vitamin K

TRUE ANSWER : ?
YOUR ANSWER : ?

Ascorbic acid acts as an

None of these

oxidizing and reducing agent both

oxidizing agent

reducing agent

TRUE ANSWER : ?
YOUR ANSWER : ?

An early sign of retinol deficiencies in man is

night blindness

xeropthalmia

none of these

keratinization

TRUE ANSWER : ?
YOUR ANSWER : ?

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