MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 81 Mcqs, each offering curated multiple-choice questions to sharpen your Cell Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Greater degree of unsaturation in fatty acids of cell membrane _________ |
| A. | Lowers the transition temperature |
| B. | Raises the transition temperature |
| C. | Has no effect on transition temperature |
| D. | Doubles the transition temperature |
| Answer» B. Raises the transition temperature | |
| 2. |
Which of the following is not a component of cell membranes? |
| A. | Phosphodiglycerides |
| B. | Sphingolipids |
| C. | Cholesterol |
| D. | Phosphotriglycerides |
| Answer» E. | |
| 3. |
Symport and Antiport is the classification of ____________ |
| A. | Primary active transport |
| B. | Secondary active transport |
| C. | Primary passive transport |
| D. | Secondary passive transport |
| Answer» C. Primary passive transport | |
| 4. |
Facilitative transporter ___________ |
| A. | Helps in facilitated diffusion |
| B. | Changes conformation |
| C. | Transports molecules passively |
| D. | Changes conformation, transports molecules and facilitated diffusion |
| Answer» E. | |
| 5. |
Antibody -coated gold particles are used in _______________ |
| A. | FRAP |
| B. | SPT |
| C. | X-ray crystallography |
| D. | Cannot be determined |
| Answer» C. X-ray crystallography | |
| 6. |
How many H⁺ ions are transported by the vacuole H+-ATPase pump and the vacuole H+-phosphatase pump per hydrolysis of ATP and pyrophosphate respectively? |
| A. | 1, 1 |
| B. | 1, 2 |
| C. | 2, 1 |
| D. | 2, 2 |
| Answer» D. 2, 2 | |
| 7. |
In animals, the amount of cholesterol present in cell membrane is ___________ |
| A. | 20% |
| B. | 15% |
| C. | 50% |
| D. | 33.33% |
| Answer» E. | |
| 8. |
Transmembrane domain of a transmembrane protein is present as _______________ |
| A. | Alpha-helix |
| B. | Beta-sheet |
| C. | Triple beta-sheet |
| D. | None of the mentioned |
| Answer» B. Beta-sheet | |
| 9. |
In the experiments to demonstrate the mobility of membrane proteins, which cells were fused with human cells? |
| A. | mouse cells |
| B. | drosophila cells |
| C. | tumor cells |
| D. | bacterial cells |
| Answer» B. drosophila cells | |
| 10. |
The lipids present in cell membrane are _____________ |
| A. | Polar |
| B. | Non- polar |
| C. | Charged |
| D. | Ampipathic |
| Answer» E. | |
| 11. |
During salt stress condition in Arabidopsis, which of the following antiport proteins are used? |
| A. | AvPI and AtNHX |
| B. | AvPI and AtDBF |
| C. | AvPI and AvPII |
| D. | None of the mentioned |
| Answer» B. AvPI and AtDBF | |
| 12. |
Which is the first membrane protein to have its amino acid sequence determined? |
| A. | Glycophorin A |
| B. | Glycophorin B |
| C. | Glycophorin C |
| D. | Glycophorin D |
| Answer» B. Glycophorin B | |
| 13. |
Transverse diffusion (flip-flop) is the movement of _____________ |
| A. | cholesterol molecule |
| B. | amino acid |
| C. | protein |
| D. | phospholipid |
| Answer» E. | |
| 14. |
Two cells can be operated in such a way that leads to a common continuous plasma membrane of both. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 15. |
The mobility of integral proteins can be measured by physical state of the ______________ |
| A. | amino acids |
| B. | external phospholipids |
| C. | membrane phospholipids |
| D. | membrane appendages |
| Answer» D. membrane appendages | |
| 16. |
Which of the following can not be used to mediate the fusion of plasma membranes of two different cells? |
| A. | electric shock |
| B. | inactivated viruses |
| C. | Polyethylene glycol |
| D. | emulsifier |
| Answer» E. | |
| 17. |
Band 3 and glycophorins are membrane proteins that contain ________________ |
| A. | carbohydrates |
| B. | sterols |
| C. | lipids |
| D. | nucleic acids |
| Answer» B. sterols | |
| 18. |
Which type of molecules are used in SPT? |
| A. | organic dye |
| B. | inorganic dye |
| C. | antibodies |
| D. | gold particles |
| Answer» E. | |
| 19. |
The use of optical tweezers in membrane biology was done to confirm the ________________ nature of membranes. |
| A. | self-replicating |
| B. | elastic |
| C. | inelastic |
| D. | photo-responsive |
| Answer» C. inelastic | |
| 20. |
Hemolysis is associated with which type of cells? |
| A. | hepatocytes |
| B. | germ cells |
| C. | somatic cells |
| D. | red blood cells |
| Answer» E. | |
| 21. |
The erythrocyte has a _________________ shape. |
| A. | spherical |
| B. | convex |
| C. | concave |
| D. | bi-concave |
| Answer» E. | |
| 22. |
The sperm cell is covered by a _____________ |
| A. | sheath |
| B. | cell wall |
| C. | continuous membrane |
| D. | discontinuous membrane |
| Answer» D. discontinuous membrane | |
| 23. |
Which of the following genetic diseases is caused by mutations in a membrane protein? |
| A. | Alzheimer’s disease |
| B. | Parkinson’s disease |
| C. | Anemia |
| D. | Hemolytic anemia |
| Answer» E. | |
| 24. |
Glycophorin is involved in which of the following disease? |
| A. | viral fever |
| B. | common cold |
| C. | asthma |
| D. | malaria |
| Answer» E. | |
| 25. |
Response to external stimulus is called _______________ |
| A. | reaction |
| B. | immunity |
| C. | response |
| D. | irritability |
| Answer» E. | |
| 26. |
FRAP can be used to analyze living cells. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 27. |
The specific molecules that bind to receptors are _____________ |
| A. | Ligands |
| B. | Co-enzymes |
| C. | Substrates |
| D. | Enzymes |
| Answer» B. Co-enzymes | |
| 28. |
The fluid mosaic model was proposed in the year __________ |
| A. | 1942 |
| B. | 1972 |
| C. | 2002 |
| D. | 1872 |
| Answer» C. 2002 | |
| 29. |
Which material was used by Overton in his experiments to conclude the lipid nature of plasma membrane? |
| A. | bacteria |
| B. | yeast |
| C. | plant root hair |
| D. | animal root hair |
| Answer» D. animal root hair | |
| 30. |
Energy transduction is the underlying process of which of the following? |
| A. | DNA |
| B. | Transcription |
| C. | Translation |
| D. | Photosynthesis |
| Answer» E. | |
| 31. |
The first insights into the chemical nature of plasma membranes date back to __________ |
| A. | 1700 |
| B. | 1790 |
| C. | 1800 |
| D. | 1890 |
| Answer» E. | |
| 32. |
Information is coded in the form of fast moving impulse in which types of cells? |
| A. | epithelial |
| B. | endothelial |
| C. | neurons |
| D. | hepatocytes |
| Answer» D. hepatocytes | |
| 33. |
Which part of a neuron receives information from other neurons? |
| A. | cell body |
| B. | axon |
| C. | dendrites |
| D. | myelin sheath |
| Answer» D. myelin sheath | |
| 34. |
The information is forwarded from the neuron through which part? |
| A. | axon |
| B. | soma |
| C. | dendrites |
| D. | nucleus |
| Answer» B. soma | |
| 35. |
Myelin sheath is composed mainly of _____________ |
| A. | proteins |
| B. | lipids |
| C. | nucleic acids |
| D. | cholesterol |
| Answer» C. nucleic acids | |
| 36. |
Membrane potential is present only in nerve cells. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 37. |
On which of the following organisms, the research on nerve cells was first carried out? |
| A. | Drosophila melanogaster |
| B. | Grasshopper |
| C. | Giant squid |
| D. | Octopus |
| Answer» D. Octopus | |
| 38. |
Depolarization is when ___________ ions flow inside the neuron’s membrane. |
| A. | Potassium |
| B. | Sodium |
| C. | Chloride |
| D. | Magnesium |
| Answer» C. Chloride | |
| 39. |
A neuron fires when _____________________ |
| A. | action potential is achieved |
| B. | apoptosis is induced |
| C. | re-stimulation occurs |
| D. | stimulation ceases |
| Answer» B. apoptosis is induced | |
| 40. |
Which of the following exists in nerve and muscle cells? |
| A. | resting potential |
| B. | membrane potential |
| C. | potassium equilibrium potential |
| D. | sodium equilibrium potential |
| Answer» B. membrane potential | |
| 41. |
Which of the following has the highest permeability in a resting nerve cell? |
| A. | Na⁺ |
| B. | Cl¯ |
| C. | I¯ |
| D. | K⁺ |
| Answer» E. | |
| 42. |
Which of the following molecules affects the mobility of fatty acyl chains in the plasma membrane? |
| A. | starch |
| B. | glycogen |
| C. | cholesterol |
| D. | carbohydrates |
| Answer» D. carbohydrates | |
| 43. |
The ___________ the degree of unsaturation of the fatty acids of the bilayer, the ___________ the temperature before the bilayer gels. |
| A. | greater, lower |
| B. | greater, more |
| C. | lesser, higher |
| D. | None of the mentioned |
| Answer» B. greater, more | |
| 44. |
According to the fluid mosaic model, the membrane is _____________ |
| A. | rigid |
| B. | discontinuous |
| C. | sheet-like |
| D. | fluid-like |
| Answer» E. | |
| 45. |
Fluidity and viscosity are the same. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 46. |
Which of the following attributes of the membrane is most affected at the transition temperature? |
| A. | size |
| B. | fluidity |
| C. | internal composition |
| D. | internal environment |
| Answer» C. internal composition | |
| 47. |
FRAP is a technique to detect ___________ |
| A. | Membrane proteins |
| B. | Transporting ions |
| C. | Cholesterol patches |
| D. | Cannot be determined |
| Answer» B. Transporting ions | |
| 48. |
Which part of cholesterol molecule is not embedded in the lipid bilayer? |
| A. | Hydroxyl end of cholesterol |
| B. | Entire molecule of cholesterol |
| C. | Hydrophobic rings |
| D. | Hydroxyl end and 1⁄4th of the hydrophobic rings |
| Answer» B. Entire molecule of cholesterol | |
| 49. |
The ion most abundant in cells and most permeable to cell membrane is ____________ |
| A. | K⁺ |
| B. | Ca²⁺ |
| C. | Na⁺ |
| D. | H⁺ |
| Answer» B. Ca²⁺ | |
| 50. |
Which of the following promote curvature of cell membrane? |
| A. | Phosphatidyl choline (PC) |
| B. | Phosphatidyl serine (PS) |
| C. | Phosphatidyl ethanolamine (PE) |
| D. | Phosphatidyl inositol(PI) |
| Answer» D. Phosphatidyl inositol(PI) | |