PCB 3023 - Cell Biology Exam 2 Review
Questions and Answers
where can cell membranes be found? - ANSWER-1. enclosing the cell
2. enclosing the organalles
why does the mitochondria has two membranes? - ANSWER-to increase the surface area inside
membrane functions - ANSWER-1. define boundaries t...
flippases - ANSWER✔✔-enzymes that regulate asymmetry in the membrane
lipid synthesis occurs primarily in - ANSWER✔✔-the ER
phospholipids are synthesized - ANSWER✔✔-only in the cytosolic monolayer of the ER membrane
(T/F) membranes lose their orientation during transport - ANSWER✔✔-false
movements exhibited by lipids in membranes - ANSWER✔✔-1. lateral diffusion
2. trasverse fluctuation
3. rotation
4. flexion
5. flip-flop
fluidity in the membrane depends on - ANSWER✔✔-- temperature
- lipid chemistry
*many other factors*
transmembrane proteins associate to the lipid bilayer by - ANSWER✔✔-- single alpha helix
- multiple alpha helices
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