1. Which of the following mineral element
facilitates insulin binding to cell receptor site?
a) Zinc
b) Selenium
c) Copper
d) Chromium
2. Which of the following is a folate analog?
a) Methotrexate
b) Carnosine
c)Azaserine
d)Aniserine
3. Histamine is a potent secretagogue of
a) Amylase by the salivary gland
b)HCI by the stomach
c) Gastrin by the stomach
d)NAHCO3
by the pancreas
4. The contraluminal plasma membrane of small
intestinal epithelial cells contain
a)Disaccharidases
b)Aminopeptidases
c)GLUT 5
d)Na+/ K+ ATPase
5. Platelet aggregation:
a) is initiated at the site of an
injury by conversion of fibrinogen to fibrin
b) is inhibited in uninjured blood
vessels by the secretion of prostacyclin by intact vascular endothelium
c) causes morphological changes and a release
of the vasodilator serotonine
d)is inhibited by the release of ADP
and thromboxane A2
6. The cones of the retina:
a)are responsible for colour vision
b)are much more numerous than rods.
c) have red, blue and green light- sensitive
pigments that differ because of small difference in the retinal prosthetic
group.
d)do not use transducin in signal
transduction
7. The nerve impulse that initiates muscular
contraction
a) begins with the binding of acetyl
choline to receptors in the sarcoplasmic reticulum
b)causes both the plasma membrane and
the transverse tubules to undergo hyperpolariation
c) causes opening of calcium channels which
lead to an increase in calcium contreation within the sarcomere
d)prevents sodium entering the
sarcomere
8. When a muscle contracts, the
a) transverse tubules shorten, the
myofibrils and sarcoplasmic reticulum close together
b)Thin filaments and thick filaments
of the sarcomere shorten
c) Light chains dissociate from the
heavy chains of myosin
d)H bands and I bands of the sarcomere
shorten because the thin filaments and thick filaments side past each other
9. Lysis of a fibrin clot:
a) is an equibrium wwith formation of
the clot
b) begins when plasmin binds to the
clot
c) requires the hydrolysis of
plasminogen into heavy and light chains
d) requires conversion of plasminogen
by tissue plasminogen activator
10.ATP concentration is maintained relatively
constant during muscle contraction by
a) increasing the metabolic activity
b)the action of adenylate kinase
c) theaction of creatne phosphokinase
d)all of the above
Learn more: MCQ on Biochemistry
Answers
1. d) Chromium
2. a) Methotrexate
3. b)HCI by the stomach
4. d)Na+/ K+ ATPase
5. d)is inhibited by the release of
ADP and thromboxane A2
6. a)are responsible for colour vision
7. c) causes opening of calcium
channels which lead to an increase in calcium contreation within the sarcomere
8. d)H bands and I bands of the
sarcomere shorten because the thin filaments and thick filaments side past each
other
9. d) requires conversion of
plasminogen by tissue plasminogen activator
10. d)all of the above (Lecturer in Biochemistry Questions)
all the mcqs are very very helpful
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