Cell Biology (BIO 353)- Exam 2 Practice Questions and Answers
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Course
2024/2025
Institution
2024/2025
Cell Biology (BIO 353)- Exam 2 Practice
Questions and Answers
Actin filaments:
a) have a diameter of 7 nm and contain 375 amino acids.
b) are composed of 2 subunits each of molecular weight of 42 kDa.
c) have a diameter of 7 nm and contain 450 amino acids.
d) have no polarity.
e) have GTP in...
e) none of the above - Ans:✔✔-a) helps identify the assembly vs the disassembly end
Actin filaments associate with a nucleotide triphosphate.
a) True
b) False - Ans:✔✔-a) True
Treadmilling of actin filaments only occurs in a test tube.
a) True
b) False - Ans:✔✔-b) False
Preassembled nucleation sites in a living cell are equivalent to the intracellular preference for actin
filaments
a) True
b) False - Ans:✔✔-a) True
Intracellular preference for actin filaments :
a) is a way to look a the geography of the cell and the role of the nucleus.
b) is a way to look at the geography of the cell and show where the role of actin filaments is important.
c) explain how actin gets into the nucleus.
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