PCB 3023 - Cell Biology Exam 2 Review Questions And Answers With 100% Correct Answers
8 views 0 purchase
Module
PCB 3023 - Cell Biology
Institution
PCB 3023 - Cell Biology
common characteristics of cytoskeletal filaments - 1. They are dynamic and adaptable
2. They can form stable structures
3. Assemble from small subunits
movements exhibited by lipids in membranes - 1. lateral diffusion
2. trasverse fluctuation
3. rotation
4. flexion
5. flip-flop
where can ce...
PCB 3023 - Cell Biology Exam 2 Review
common characteristics of cytoskeletal filaments - 1. They are dynamic and adaptable
2. They can form stable structures
3. Assemble from small subunits
movements exhibited by lipids in membranes - 1. lateral diffusion
2. trasverse fluctuation
3. rotation
4. flexion
5. flip-flop
where can cell membranes be found? - 1. enclosing the cell
2. enclosing the organalles
why does the mitochondria has two membranes? - to increase the surface area inside
membrane functions - 1. define boundaries to regulate the
a. chemical composition of the region they enclose
b. interaction of the region they enclose with their external environment
2. define boundaries that are soft and flexible which allow for
a. receiving information
b. import and export of small molecules
c. capacity for movement and expansion
(T/F) The aggregation of the hydrophobic ends of lipids lowers the free energy of the solution. -
true
, the region formed by the hydrophobic tales of lipids is known as - the hydrophobic core
a cell membrane is composed of - 1. phospholipids
2. glycolipids
3. cholesterol
phospholipids found in a cell membrane - 1. phosphatidylethanolamine
2. phosphatidylserine (negative)
3. phosphatidylcholine
glycolipids - glycosyl derivatives of lipids, that is, they have one or more monosaccharide residues
bound by a glycosidic linkage
(T/F) glycolipids are phospholipids - false
a cholesterol consists of - 1. a polar head group
2. a rigid planar steroid ring structure
3. a nonpolar hydrocarbon tail
flippases - enzymes that regulate asymmetry in the membrane
lipid synthesis occurs primarily in - the ER
phospholipids are synthesized - only in the cytosolic monolayer of the ER membrane
(T/F) membranes lose their orientation during transport - false
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ACADEMICMATERIALS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £6.51. You're not tied to anything after your purchase.