Fluid Mosaic model (MEMBRANE PROTEINS)

Question 1

Function of biological membranes

Answer 1

1. Define cell boundary
2. Define enclose compartments
3. Control movement of material into and out of cells
4. Allow response to external stimuli
5. Enable interactions between cells
6. Provide scaffold for biochemical activities

Question 2

The plasma membrane

Answer 2

• Allows movement of cations that reduces contractions
• Trilaminar structure made of a phospholipid bilayer (looks like an oreo)
• Is about 6nm think, very consistent between between cell types

Question 3

Red blood cells

Answer 3

Are often used in studies of membrane structure due to their lack of nuclei or internal membranes