Listeria is a bacterial parasite that has evolved unique ways to enter animal cells and then use actin polymerization for its intracellular movement.Which of the following statements is true in regards to Listeria and actin polymerization?
A) Listeria ActA protein binds and inactivates the Arp2/3 complex.
B) Listeria ActA binds VASP,which enhances ATP-actin assembly.
C) Cofilin is necessary to accelerate the assembly of the (−) end of the filament.
D) CapZ promotes the elongation of the filament.
Correct Answer:
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Q12: Gelsolin is activated by:
A)ATP binding.
B)phosphorylation.
C)Ca²⁺ binding.
D)dephosphorylation.
Q13: What actin-binding protein mediates gel-sol transitions,and how
Q14: Decoration of actin filaments with myosin S1
Q15: The plasma membrane of eukaryotic cells is
Q16: Three major groups of filament systems comprising
Q18: Cofilin:
A)cleaves actin by binding the ATP-actin in
Q19: During treadmilling,actin subunits add:
A)predominantly to filament (+)ends.
B)predominantly
Q20: What is the function of thymosin β₄?
Q21: Lamellipodia are located:
A)at a moving cell's trailing
Q22: In the operational model for movement of
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