AP Biology / Unit 2: Cell Structure and Function
2.3 Plasma Membrane
Notes
The fluid mosaic model: a phospholipid bilayer with embedded proteins that move.
- Integral proteins span the membrane; peripheral proteins sit on the surface.
- Cholesterol regulates fluidity. Glycoproteins help with cell recognition.
Practice
Integral membrane proteins have:
Their middle sits among the lipid tails.
Cholesterol in animal membranes:
A fluidity buffer.
The "mosaic" in the fluid mosaic model refers to:
Many kinds of proteins.
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