Biology Multiple Choice Questions and Answers for Different Competitive Exams

MCQ on Plasma Membrane (Cell Membrane)

1. Steroid hormones have receptors predominantly on
a) cell surface
b) cytoplasm
c) both cell surface and cytoplasm
d) inside nucleus only
2. The major interaction responsible for stabilizing plasma membrane
a)hydrophilic interactions
b)covalent bonds
c)ionic bonds
d)hydrophobic interactions
3. The organelles involved in protein transport
a)ER and Golgi
b)ER and mitochondria
c)Golgi and mitochondria
d) lysosomes and golgi
4. The role of carbohydrates in cell membrane
a) cell adhesion
b) cell-cell recognition
c) assisting transport across cell membrane
d) cell storage reserve
5. All hormones can cross plasma membrane except
a) Estrogen
b) insulin
c) progesterone
d) thyroxine
6. The major biomolecule responsible for selective uptake of materials across plasma membrane
b) protein
c) lipids
7. All the following substance pass through cell membrane except Selective transport across plasma membrane
a) O2
b) H2O
c) CO2
d) H+
8. At physiological pH increase in cholesterol level
a) increases fluidity
b)decreases fluidity
c) no change in fluidity
d) none of the above
9) The longer the fatty acid chain, fluidity of the lipid bi layer
a) increases
b) decreases
c) no change in fluidity
d) none of the above
10. The inner leaflets of erythrocytes has
a) sphingomyelin and phosphatidylcholine
b) phosphatidylserine and phosphatidylethanolamine.
c) sphingomyelin and phosphatidylserine
d) phosphatidyl serine and phosphatidylcholine
Learn more:
1. b) cytoplasm
2. d) hydrophobic interactions
3. a) ER and Golgi
4. b) cell-cell recognition
5. b) insulin
6. b) protein
7. d) H+
8. b) decreases fluidity
9. b) decreases
10.b) phosphatidylserine and phosphatidylethanolamine.

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