10 Questions
What is the main function of cholesterol in the cell membrane?
Decrease membrane permeability to small molecules
In what way do glycolipids contribute to cell function?
Enhance cell recognition and adhesion
What is a characteristic of integral membrane proteins?
Interact with hydrophobic tails of lipid molecules
What is the purpose of sphingolipids in the cell membrane?
Serve as receptor sites
How do peripheral membrane proteins differ from integral membrane proteins?
peripheral proteins are temporarily associated with the bilayer
What is the main characteristic of lipid molecules in cell membranes?
Being amphiphilic with a hydrophilic end and a hydrophobic end
How do unsaturated bonds in phospholipids affect membrane structure?
Cause more disorder making it harder to freeze
Why is the transition temperature lower in membranes with more double bonds in their phospholipids?
To accommodate the increased disorder due to unsaturated bonds
How does tail length and saturation of phospholipids affect membrane fluidity?
Influence how phospholipids pack and thus affect fluidity
What is the role of phospholipids in the structure of a lipid bilayer?
Function as a barrier to protect the cell
Test your knowledge on the different variations of phospholipids, their asymmetric distribution, the role of cholesterol in stabilizing the membrane, and the impact of cholesterol on membrane deformability and temperature sensitivity.
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