VITAMINS AND COENZYMES QUIZ

Selenium is an essential component of the enzyme glutathione peroxidase which

scavenges toxic hydoperoxycompounds in tissues

reduces toxic hydoperoxycompounds in tissues

oxidizes toxic hydoperoxycompounds in tissues

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

An early sign of retinol deficiencies in man is

none of these

night blindness

xeropthalmia

keratinization

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these is a symptom of vitamin A deficiency?

Osteoporosis

Impaired taste perception

Impaired blood clotting

Blindness

TRUE ANSWER : ?
YOUR ANSWER : ?

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

form chelation

all of these

stabilize the semiquinone

de-stabilize the semiquinone

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these hormones is a catecholamine?

Norepinephrine

Follitropin

Tetrahydrofolate

Tetraiodothyronine

TRUE ANSWER : ?
YOUR ANSWER : ?

Biotin occurs mainly in combined forms bound to protein through

ε-N-lipoyl - L-lysine

ε-S-lysine moiety

ε-N-biotinyl-L-lysine

ε-N-lysine moiety

TRUE ANSWER : ?
YOUR ANSWER : ?

Vitamin B12 is useful in the prevention and treatment of

cataract

pernicious anemia

scurvy

beri-beri

TRUE ANSWER : ?
YOUR ANSWER : ?

The vitamin riboflavin is part of the __________ molecule.

ferredoxin

pyridoxal phosphat

pyrophosphate

FAD

TRUE ANSWER : ?
YOUR ANSWER : ?

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

both (a) and (b)

nonheme type

heme-protein

flavin moiety

TRUE ANSWER : ?
YOUR ANSWER : ?

A deficiency of thiamin produces the disease known as

anemia

cataract

scurvy

beri-beri

TRUE ANSWER : ?
YOUR ANSWER : ?

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