VITAMINS AND COENZYMES QUIZ

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 a single disulfide bond

either end via two disulfide bonds

TRUE ANSWER : ?
YOUR ANSWER : ?

Lipoic acid is a co-factor of the

both (a) and (b)

pyruvic dehydrogenase

di-hydroorotate dehydrogenase

α-ketoglutaric dehydrogenase

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these is a symptom of vitamin A deficiency?

Impaired taste perception

Osteoporosis

Blindness

Impaired blood clotting

TRUE ANSWER : ?
YOUR ANSWER : ?

A deficiency of niacin causes

pellagra

anemia

cataract

scurvy

TRUE ANSWER : ?
YOUR ANSWER : ?

Lipoic acid exists in

none of these

reduced form

oxidized and reduced form both

oxidized form

TRUE ANSWER : ?
YOUR ANSWER : ?

The symptoms of retinol excess are

bone fragility

nausea

all of these

weakness

TRUE ANSWER : ?
YOUR ANSWER : ?

An enzyme, L-folate reductase reduces folic acid to

tetrahydrofolic acid

hydrofolic acid

trihydrofolic acid

dihydrofolic acid

TRUE ANSWER : ?
YOUR ANSWER : ?

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

six isoprene units

four isoprene units

nine isoprene units

four isoprene units

TRUE ANSWER : ?
YOUR ANSWER : ?

The most prominent role that tocopherol has in in-vitro systems is as a strong

oxidizing agent

antioxidants

all of these

reducing agent

TRUE ANSWER : ?
YOUR ANSWER : ?

β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by

animal

plants and animals both

none of these

plants

TRUE ANSWER : ?
YOUR ANSWER : ?

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