In Response to a Chemotactic Signal,a Cell Forms Structures to Aid

Multiple Choice

In response to a chemotactic signal,a cell forms structures to aid in locomotion.In lamellipodia,active Rac will stimulate F-actin polymerization at the leading edge via _____,whereas actin that will form stress fibers will be recruited by formin downstream of activation of this small GTPase _____.

A) Arp 2/3;Rho
B) Arp 2/3;Cdc42
C) WASP;Rho
D) Rho kinase;Cdc42