Cell membrane

Question 1

what is another name for the ubiquitous cell membrane

Answer 1

unit membrane

Question 2

what is a phospholipid formed from

Answer 2

a neutral fat in which one of the fatty acid groups on the glycerol moiety is replaced by a phosphate group

Question 3

what is the basic function of the phospholipid bilayer:

Answer 3

separate 2 aqueous compartments

Question 4

what is in the outer leaflet of the phospholipid bilayer

Answer 4

cholesterol
phosphatidylcholine
phosphatidylehtanolamine
sphingomyelin

Question 5

what is in the inner leaflet of the phospholipid bilayer

Answer 5

cholesterol
phosphatidylethanolamine
phosphatidylserine
phosphatidylinositol

Question 6

characteristics of glycolipids

Answer 6

• found only in outer leaflet with carb. portion facing the EM
• fatty acid tail is coupled via sphingosine to a carb head group
• create a cell coat involved in cell-to-cell interactions and conveys antigenicity

Question 7

characteristics of glycocalyx

Answer 7

• not an integral part of the membrane
• carb coat on the extracellular surface of the cell membrane composed of Carb portions of the glycolipids and glycoproteins