The Plasma Membrane

Question 1

What are X2 key components of the cell membrane?

Answer 1

-Phospholipids and Proteins

Question 2

What does it mean by Phospholipids are ‘Amphipathic’ ?

Answer 2

-Has BOTH polar and non-polar parts

Question 3

What are the Phospholipids arranged into in the cell membrane?

Answer 3

-Phospholipid Bilayer

Question 4

What makes the Phospholipid Bilayer flexible?

Answer 4

-It is a Fluid Structure

Question 5

What are Peripheral Proteins?

Answer 5

-Found outside the cell membrane

Question 6

What are Integral Membrane Proteins?

Answer 6

-Within the cell membrane

Question 7

What are Transmembrane Proteins?

Answer 7

• Type of Integral Protein

- Spans whole width of the cell membrane

Question 8

At what type of protein does Intracellular Signalling take place?

Answer 8

• Integral

- Intracellular Signalling (GTP-Binding, Kinases-phosphorylation trigger cascades…)

Question 9

What are Adhesion Molecules?

Answer 9

• form physical contact with Extracellular Matrix.

- Regulate cell shale, growth and differentiation

Question 10

What are Protein Carriers?

Answer 10

-Facilitate transport of molecules across the membrane

Question 11

What do Protein Pumps require to function?

Answer 11

-ATP

Question 12

What are membrane carbohydrates for?

Answer 12

• Are Self-Identity Markers

- Enable cells to identify and interact with one another.