VITAMINS AND COENZYMES QUIZ

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

de-stabilize the semiquinone

stabilize the semiquinone

all of these

form chelation

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following compounds/(s) belong/(s) to the vitamin B6 group?

Pyridoxal

Pyridoxamine

All of these

Pyridoxine

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these hormones is a catecholamine?

Norepinephrine

Tetraiodothyronine

Tetrahydrofolate

Follitropin

TRUE ANSWER : ?
YOUR ANSWER : ?

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

sugars

amino acids

carbohydrates

fatty acids

TRUE ANSWER : ?
YOUR ANSWER : ?

An early sign of retinol deficiencies in man is

night blindness

xeropthalmia

none of these

keratinization

TRUE ANSWER : ?
YOUR ANSWER : ?

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

flavin moiety

heme-protein

nonheme type

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

Ascorbic acid acts as an

oxidizing agent

reducing agent

None of these

oxidizing and reducing agent both

TRUE ANSWER : ?
YOUR ANSWER : ?

E.coli ACP has its molecular weight as around

90,000

9000

39000

19000

TRUE ANSWER : ?
YOUR ANSWER : ?

An example of a digestive hormone is

pepsin

gastrin

lipase

amylase

TRUE ANSWER : ?
YOUR ANSWER : ?

Biotin occurs mainly in combined forms bound to protein through

ε-S-lysine moiety

ε-N-lipoyl - L-lysine

ε-N-biotinyl-L-lysine

ε-N-lysine moiety

TRUE ANSWER : ?
YOUR ANSWER : ?

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