Biological membranes. Flashcards
1
Q
Are the phosphate heads in a plasma membrane hydrophilic or hydrophobic?
A
Hydrophilic
2
Q
Are the ‘tails’ in the plasma membrane hydrophilic or hydrophobic?
A
Hydrophobic
3
Q
Name two functions of the plasma membrane
A
- Forming vesicles
- Separates organelle contents from the cytoplasm.
4
Q
Name the components of the phospholipid bilayer.
A
- Phosphate heads
- Hydrophilic tails
- Intrinsic proteins
- Extrinsic proteins
- Glycocalyx (glycolipids and glycoproteins)
- Cholesterol
5
Q
State the term used to describe a membrane through which some substances can pass freely
but others cannot.
A
PARTIALLY-permeable
6
Q
What model describes the plasma membrane?
A
Fluid-mosaic model.
7
Q
What is meant by cell signalling?
A
Communication between cells.
8
Q
A
