VITAMINS AND COENZYMES QUIZ

Vitamin B12 is useful in the prevention and treatment of

scurvy

beri-beri

pernicious anemia

cataract

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-lysine moiety

ε-N-lipoyl - L-lysine

TRUE ANSWER : ?
YOUR ANSWER : ?

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

flavin moiety

heme-protein

both (a) and (b)

nonheme type

TRUE ANSWER : ?
YOUR ANSWER : ?

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

stabilize the semiquinone

de-stabilize the semiquinone

all of these

form chelation

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these is a vitamin A precursor?

Thiamine

Pyridoxine

Beta-Carotene

Cobalamin

TRUE ANSWER : ?
YOUR ANSWER : ?

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

fatty acids

carbohydrates

sugars

amino acids

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 : ?

Which of these is a symptom of vitamin A deficiency?

Osteoporosis

Impaired taste perception

Blindness

Impaired blood clotting

TRUE ANSWER : ?
YOUR ANSWER : ?

The symptoms of retinol excess are

nausea

weakness

all of these

bone fragility

TRUE ANSWER : ?
YOUR ANSWER : ?

A fat-soluble vitamin that regulates blood clotting is

niacin

vitamin C

vitamin A

vitamin K

TRUE ANSWER : ?
YOUR ANSWER : ?

↑