VITAMINS AND COENZYMES QUIZ

The disease Beriberi is due to a dietary deficiency in

vitamin B1 (thiamine)

vitamin B2 (riboflavin)

vitamin B12

vitamin B6 (pyridoxine)

TRUE ANSWER : ?
YOUR ANSWER : ?

A deficiency of Vitamin K results in a decreased level of

prothrombin

fibrinogen

thrombin

fibrin

TRUE ANSWER : ?
YOUR ANSWER : ?

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

beri-beri

pernicious anemia

rickets

cataract

TRUE ANSWER : ?
YOUR ANSWER : ?

An early sign of retinol deficiencies in man is

keratinization

night blindness

none of these

xeropthalmia

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following are reduced coenzymes?

ATP and GTP

NAD+ and FAD

Coenzyme A and ubiquinone

NADH and FADH2

TRUE ANSWER : ?
YOUR ANSWER : ?

Dihydroorotate dehydrogenase contains

2 flavins and 2 atoms of iron per molecule

4 flavins and 4 atoms of iron per molecule

4 flavins and 2 atoms of iron per molecule

2 flavins and 4 atoms of iron per molecule

TRUE ANSWER : ?
YOUR ANSWER : ?

The vitamin riboflavin, which occurs as a yellow pigment in egg yolk and milk become

colorless on reduction with Zn in acid and regained its color on re-oxidation

more deep in color on reduction with Zn in acid and regained its color on re-oxidation

more deep in color on oxidation and regained its color on reduction with Zn in acid

colorless on oxidation and regained its color on reduction with Zn in acid

TRUE ANSWER : ?
YOUR ANSWER : ?

Lipoic acid is a co-factor of the

pyruvic dehydrogenase

α-ketoglutaric dehydrogenase

both (a) and (b)

di-hydroorotate dehydrogenase

TRUE ANSWER : ?
YOUR ANSWER : ?

In the co-enzyme B12the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.

5-6 dimethylbenzimidazole

hydroxycobalamin

cyanocobalamin

adenine

TRUE ANSWER : ?
YOUR ANSWER : ?

A deficiency of thiamin produces the disease known as

scurvy

cataract

anemia

beri-beri

TRUE ANSWER : ?
YOUR ANSWER : ?