9 - Biological Membranes Flashcards
1
Q
membrane layers of PM and ER
A
er
inner luminal leaflet
outer cystosolic leaflet
pm
inner/extra mem
2
Q
why are p-lipids amphiphatic?
A
region of HYDROPHOB/PHIL
HEAD IS HYDROPHILLIC AND POLAR v.v
3
Q
4 phosholipds?
A
- phosphotidylcholine
- phosphotidylserine [carries a neg charge]
- phosphotidylethanolamine
- sphingomyelin
4
Q
why is membrane fluidity important?
A
= allow membranes to fuse
- allow lipids to diffuse
- equal share between daughter cells
- motility change shape
5
Q
fluidity of sat and unsat p-lipids?
A
unsaturated [db] would be more fluid
6
Q
how is a ohospholipid synt from ER?
A
/
7
Q
What is a glycolipid?
A
olipid based on sphingocene with sugar attahced
8
Q
what is the glycocalyx?
A
carb rich area
made of glycolipids
protects agasint mech damage
9
Q
how are proteins inserted into membrane?
A
single pass and double pass
