Exam (elaborations)
BIO 344 Final Practice Exam Questions answers latest update
- Course
- Bio 344
- Institution
- University Of Texas - Austin
BIO 344 Final Practice Exam Questions answers latest update
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BIO 344 Final Practice ExamThe plasma membrane of an animal cell contains
a. RNA
b. DNA
c. Proteins
d. all of the above - d. Proteins
What is the non polar part of a phospholipid - Fatty acid chains (tails)
How are membranes held together - non-covalent forces
What does a phospholipase do - enzymes that cleave a phospholipid molecule in
specific areas
What does a kinase do - an enzyme that adds a phosphate to a substrate
What does a phophatase do - an enzyme that removes a phosphate from a
substrate
What does FRAP measure - rate of diffusion of membrane proteins
,An example of an amphipilic phospholipid
a. diacylglycerol
b.cholesterols
c. glycerol
d. phosphatidylserine
e. none - d. phosphatidylserine
What does the "3" in PI-3 kinase tell you - a phosphate will be added to the "3"
position of the PI ring
What are the three types of membrane lipid diffusion - Lateral: side to side
Transverse: flipping
Rotational: rotating
What does a lipid phosphatase do - enzyme that removes a phosphate from a
lipid
What is a hydropathy plot? What does each peak tell you - how many times a
protein crosses the membrane
What is a lipid raft - thick region with higher concentrations of certain membrane
proteins (organize and concentrate membrane proteins)
, If there is a membrane protein inside a bilayer, will the amino acids which make
up this protein be
a. hydrophilic
b. hydrophobic - b. hydrophobic
What are the components of a sphingolipid - spingosine, fatty acid, phosphate,
and no glycerol
Name two examples of phospholipid translocators - Flipase and scramblase
Any sort of glycolipid or sugar will be found on which side of the membrane
a.cytosolic
b. extracellular - b. extracellular
Are proteins a component of phophatidylserine
a. yes
b.no - b. no
What determines the direction of transport of a charged ion through a channel -
concentration/elelectrochemical gradient
What determines the direction of transport of an uncharged ion through an ion
channel - concentration gradient
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