Lecture 4 (Cell Membrane)

Question 1

What are some aspects of cell membrane present in both inner and outer leaflets?

Answer 1

Cholesterol and Phosphatidyethylanolamine

Question 2

What special components of phospholipid bilayer is present in the outer leaflets only?

Answer 2

Phosphatidylcholine, Sphingomyelin, Glycolipids, Glycosylphosphatidylinositol.

Question 3

What special components of phospholipid bilayer is present in the inner leaflets only?

Answer 3

Phosphatidylserine and Phosphatidylinositol

Question 4

What are lipid rafts?

Answer 4

Organizing centers for assembly of signaling molecules, influence membrane fluidity, involve in membrane protein trafficking, regulate neurotransmission and receptor trafficking

Question 5

Example of lipid raft

Answer 5

cholesterol and sphingolipids

Question 6

State the components of a cell membrane (7)

Answer 6

Phospholipid head, two hydrophobic tails, integral proteins, transmembrane protein, peripheral protein

Question 7

What are glycocalx?

Answer 7

Outside the membrane, these are carb coats that are made of glycolipids/glycoproteins.