2.2

Question 1

cell envolope

Answer 1

all the stuff outside of the cytoplasmic membrane
its diverse

Question 2

major structures of cell envolope

Answer 2

CAN include cytoplasmic membrane, cell wall, outer membrane, S layer, more

Question 3

roles of cell envelope

Answer 3

“action”
-barrier with environment
-protect cell from stress
-transport of nutrients into cell & waste out of cell
-energy conservation and production

Question 4

cytoplasmic membrane names

Answer 4

cell membrane and inner membrane

Question 5

cytoplasmic membrane

Answer 5

primary barrier between inner workings of cell and its environment

Question 6

cytoplasmic membrane roles

Answer 6

-permeability barrier: lets things in and out and also keeps things out
-protein anchor: site of proteins
-energy conservation: site of generation and dissipation of proton motive force

Question 7

cytoplasmic membrane contains the

Answer 7

lipid bilayer

Question 8

lipid bilayer heads vs tails

Answer 8

head group- hydrophilic & polar or ionic
tail - hydrophobic & non polar

Question 9

lipid bilayer head group components

Answer 9

-side chain
-glycerol phosphate backbone

Question 10

lipid bilayer tail components

Answer 10

fatty acids, incorperated into phospholipids
can be unsaturated to increase fluidity and decrease rigidity

Question 11

cytoplasmic membrane proteins

Answer 11

peripheral membrane proteins, integral membrane proteins, transmembrane proteins
found throughout phospholipid bilayer

Question 12

peripheral membrane proteins

Answer 12

loosely attached to membrane

Question 13

integral membrane proteins

Answer 13

embedded in membrane

Question 14

transmembrane proteins

Answer 14

integral membrane proteins that pass all the way through membrane

Question 15

proteins embedded in membranes have what?

Answer 15

specific topologies, meaning some stuff belongs inside and some in the cytoplasm

Question 16

amino acids in membrane are what?

Answer 16

hydrophobic

Question 17

side chains of phospholipid

Answer 17

are hydrophilic and often exposed in cytoplasm or periplasm

Question 18

the two faces of the cytoplasmic membrane

Answer 18

cytoplasmic- in
periplasmic- out