VITAMINS AND COENZYMES QUIZ

The symptoms of retinol excess are

all of these

nausea

bone fragility

weakness

TRUE ANSWER : ?
YOUR ANSWER : ?

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 : ?

Biotin occurs mainly in combined forms bound to protein through

ε-N-lipoyl - L-lysine

ε-S-lysine moiety

ε-N-lysine moiety

ε-N-biotinyl-L-lysine

TRUE ANSWER : ?
YOUR ANSWER : ?

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

heme-protein

both (a) and (b)

flavin moiety

nonheme type

TRUE ANSWER : ?
YOUR ANSWER : ?

Ascorbic acid acts as an

None of these

oxidizing agent

oxidizing and reducing agent both

reducing agent

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these is a vitamin A precursor?

Cobalamin

Beta-Carotene

Pyridoxine

Thiamine

TRUE ANSWER : ?
YOUR ANSWER : ?

A fat-soluble vitamin that regulates blood clotting is

niacin

vitamin K

vitamin C

vitamin A

TRUE ANSWER : ?
YOUR ANSWER : ?

Dihydroorotate dehydrogenase contains

2 flavins and 2 atoms of iron per molecule

2 flavins and 4 atoms of iron per molecule

4 flavins and 2 atoms of iron per molecule

4 flavins and 4 atoms of iron per molecule

TRUE ANSWER : ?
YOUR ANSWER : ?

Vitamin B12 (Cobalamin) is only synthesized by

animals

fishes

micro-organisms

plants

TRUE ANSWER : ?
YOUR ANSWER : ?

The absence of ascorbic acid in the human diet gives rise to

beri-beri

rickets

cataract

pernicious anemia

TRUE ANSWER : ?
YOUR ANSWER : ?

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