Membrane Biophysics – MCQs

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1. The plasma membrane is primarily described by the:





2. The main structural component of biological membranes is:





3. The amphipathic nature of membrane lipids means they have:





4. The most common lipid in eukaryotic plasma membranes is:





5. Cholesterol in membranes primarily functions to:





6. Integral membrane proteins differ from peripheral proteins by:





7. Which type of transport requires ATP?





8. The sodium-potassium ATPase is an example of:





9. Which technique is most widely used to study membrane fluidity?





10. Lipid rafts are microdomains enriched in:





11. The thickness of a typical lipid bilayer is approximately:





12. Passive transport moves molecules:





13. Aquaporins facilitate transport of:





14. The driving force for osmosis across membranes is:





15. Gated ion channels open in response to:





16. Which ion channel is essential for action potential propagation in neurons?





17. The patch-clamp technique is used to measure:





18. The asymmetric distribution of lipids in bilayers is maintained by:





19. The main factor influencing membrane permeability to ions is:





20. Endocytosis is an example of:





21. Lipid bilayers spontaneously form because of:





22. The electrical potential across a cell membrane is typically:





23. The protein channels that allow selective ion passage are called:





24. Which factor decreases membrane fluidity?





25. Membrane potential arises due to:





26. Which is a type of secondary active transport?





27. Detergents solubilize membranes by:





28. The electrochemical gradient combines:





29. Vesicle fusion with membranes is mediated by:





30. Which type of transport moves glucose into red blood cells?





31. The role of spectrin in membranes is to:





32. The primary determinant of membrane thickness is:





33. Which molecule can freely diffuse across the lipid bilayer?





34. Which method can create artificial planar lipid bilayers for studies?





35. Caveolae are specialized membrane invaginations rich in:





36. Which transport process is used by CFTR protein?





37. The Goldman-Hodgkin-Katz equation calculates:





38. Peripheral proteins attach to membranes via:





39. Which molecule increases membrane rigidity at high temperatures?





40. Gap junctions are formed by proteins called:





41. Proton pumps in membranes are essential for:





42. The driving force for potassium efflux from a cell is:





43. Liposomes are artificially prepared:





44. Voltage-gated channels open in response to:





45. The Nernst equation is used to calculate:





46. Which factor increases membrane fluidity?





47. The main barrier to ion movement across membranes is:





48. Receptor-mediated endocytosis involves:





49. Which organelle is enclosed by a double membrane with transport proteins?





50. The lateral mobility of lipids in membranes is best described as: