Which of the following observations made with freeze- fracture electron microscopy provides evidence for the fluid- mosaic model of membrane structure?
A) The middle of the membrane viewed under the electron microscope was smooth and regular.
B) The exterior surface of the membrane contained pits only.
C) The inner surfaces of the membrane contained pits and mounds.
D) The exterior surface of the membrane contained pits and mounds.

Question

Quizplus · Accepted Answer

The fluid-mosaic model of membrane structure suggests that membranes are composed of a phospholipid bilayer with proteins embedded within, allowing for a dynamic and fluid structure. Observation C, which notes the presence of pits and mounds on the inner surfaces of the membrane, supports this model by indicating the varied topography expected from a membrane with embedded proteins and other molecules, demonstrating the fluid and irregular nature of the membrane structure.

Which of the Following Observations Made with Freeze- Fracture Electron