VITAMINS AND COENZYMES QUIZ

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

four isoprene units

six isoprene units

four isoprene units

nine isoprene units

TRUE ANSWER : ?
YOUR ANSWER : ?

E.coli ACP has its molecular weight as around

90,000

19000

39000

9000

TRUE ANSWER : ?
YOUR ANSWER : ?

Selenium is an essential component of the enzyme glutathione peroxidase which

None of these

scavenges toxic hydoperoxycompounds in tissues

oxidizes toxic hydoperoxycompounds in tissues

reduces toxic hydoperoxycompounds in tissues

TRUE ANSWER : ?
YOUR ANSWER : ?

An early sign of retinol deficiencies in man is

none of these

xeropthalmia

keratinization

night blindness

TRUE ANSWER : ?
YOUR ANSWER : ?

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

carbohydrates

amino acids

sugars

fatty acids

TRUE ANSWER : ?
YOUR ANSWER : ?

The reductant, NADH, transfers the electrons via a flavo-proteins to the specific disulfide (S-S) protein to form a dithiol (SH,SH) protein which converts vitamin

B12(Co2+)to B12(Co+)

B12(Co) to B12(Co2+)

B12(Co+)to B12(Co2+)

B12(Co2+)to B12(Co)

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these hormones is a catecholamine?

Tetrahydrofolate

Tetraiodothyronine

Follitropin

Norepinephrine

TRUE ANSWER : ?
YOUR ANSWER : ?

Lipoic acid exists in

oxidized form

reduced form

oxidized and reduced form both

none of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these is a symptom of vitamin A deficiency?

Osteoporosis

Impaired blood clotting

Impaired taste perception

Blindness

TRUE ANSWER : ?
YOUR ANSWER : ?

The vitamin niacin is part of the __________ molecule.

pyridoxal phosphate

pyrophosphate

NAD+

ferredoxin

TRUE ANSWER : ?
YOUR ANSWER : ?

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