VITAMINS AND COENZYMES QUIZ

Vitamin-C is considered as a

fat and water soluble

none of these

water soluble

fat soluble

TRUE ANSWER : ?
YOUR ANSWER : ?

What metal ion is specifically bound by vitamin B12?

Zinc

Copper

Cobalt

Iron

TRUE ANSWER : ?
YOUR ANSWER : ?

Dihydroorotate dehydrogenase contains

2 flavins and 4 atoms of iron per molecule

2 flavins and 2 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 : ?

The vitamin riboflavin is part of the __________ molecule.

ferredoxin

pyrophosphate

pyridoxal phosphat

FAD

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following compounds/(s) belong/(s) to the vitamin B6 group?

Pyridoxal

All of these

Pyridoxamine

Pyridoxine

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of these is a vitamin A precursor?

Beta-Carotene

Pyridoxine

Thiamine

Cobalamin

TRUE ANSWER : ?
YOUR ANSWER : ?

Selenium is an essential component of the enzyme glutathione peroxidase which

scavenges toxic hydoperoxycompounds in tissues

None of these

reduces toxic hydoperoxycompounds in tissues

oxidizes toxic hydoperoxycompounds in tissues

TRUE ANSWER : ?
YOUR ANSWER : ?

Lipoic acid is a co-factor of the

pyruvic dehydrogenase

both (a) and (b)

α-ketoglutaric dehydrogenase

di-hydroorotate dehydrogenase

TRUE ANSWER : ?
YOUR ANSWER : ?

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

stabilize the semiquinone

form chelation

all of these

de-stabilize the semiquinone

TRUE ANSWER : ?
YOUR ANSWER : ?

A deficiency of niacin causes

cataract

anemia

pellagra

scurvy

TRUE ANSWER : ?
YOUR ANSWER : ?

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