VITAMINS AND COENZYMES QUIZ

The vitamin riboflavin is part of the __________ molecule.

pyrophosphate

ferredoxin

FAD

pyridoxal phosphat

TRUE ANSWER : ?
YOUR ANSWER : ?

Vitamin B12 is useful in the prevention and treatment of

cataract

scurvy

pernicious anemia

beri-beri

TRUE ANSWER : ?
YOUR ANSWER : ?

E.coli ACP has its molecular weight as around

39000

9000

19000

90,000

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following are reduced coenzymes?

NAD+ and FAD

NADH and FADH2

ATP and GTP

Coenzyme A and ubiquinone

TRUE ANSWER : ?
YOUR ANSWER : ?

Dihydroorotate dehydrogenase contains

4 flavins and 2 atoms of iron per molecule

2 flavins and 2 atoms of iron per molecule

2 flavins and 4 atoms of iron per molecule

4 flavins and 4 atoms of iron per molecule

TRUE ANSWER : ?
YOUR ANSWER : ?

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

four isoprene units

four isoprene units

six isoprene units

nine isoprene units

TRUE ANSWER : ?
YOUR ANSWER : ?

Models of end-linked Osaka VI Fibrinogen dimers, a bilayer dimer is linked at

both ends by one disulfide bond

both ends by two disulfide bonds

either end via two disulfide bonds

either end via a single disulfide bond

TRUE ANSWER : ?
YOUR ANSWER : ?

Lipoic acid exists in

none of these

oxidized form

oxidized and reduced form both

reduced form

TRUE ANSWER : ?
YOUR ANSWER : ?

Lipoic acid is a co-factor of the

di-hydroorotate dehydrogenase

α-ketoglutaric dehydrogenase

both (a) and (b)

pyruvic dehydrogenase

TRUE ANSWER : ?
YOUR ANSWER : ?

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

stabilize the semiquinone

form chelation

de-stabilize the semiquinone

all of these

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YOUR ANSWER : ?

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