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BIO 353 (Cell Biology) Exam 1 Latest Updated Solution Arizona State University
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BIO 353 (Cell Biology) Exam 1 Latest Updated Solution Arizona State University
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BIO 353 (Cell Biology) Exam 1 Latest Updated SolutionArizona State University
1. Unsaturated sites in the fatty acid tails of phospholipids are places
that water can use to leak through the membrane.
Correct Answer -True
2. Phosphatidylserine influences a great deal of area primarily due to its
large size.
Correct Answer -False
3. Transmembrane proteins _________.
Correct Answer -can move laterally and cannot flip 180˚in the
membrane
4. The presence of two disulfide bonds near each other is a good thing
when a stretch of protein is to be immobilized.
Correct Answer -True
5. The empty center of a single pass transmembrane protein provides a
channel for the transport of ions.
Correct Answer -False
6. Membrane anchors set up geography in a cell.
Correct Answer -True
, 7. Integrin receptor binding results in the recruitment of _________.
Correct Answer -actin filaments
8. The sodium/potassium ATPase removes ___________ ions from the
cell and pumps ______________ ions into the cell against their
respective concentration gradients.
Correct Answer -3 sodium; 2 potassium
9. Actin filaments ______________.
Correct Answer -have a diameter of 7 nm and contain 375 amino
acids
10. Actin filaments will ____________.
a. undergo treadmilling in a test tube
b. undergo treadmilling in a living cell
c. never reach equilibrium
d. Two of the above
e. None of the above
f. I don't know the answer
Correct Answer -Two of the above
11. Actin filaments associate with a nucleotide triphosphate.
Correct Answer -True
12. Treadmilling of actin filaments only occurs in a test tube.
Correct Answer -False
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