Semaphorin receptors (called plexins) promote growth cone collapse via the small GTPase RhoA. How is this most likely to be accomplished?
A) Activation of a RhoA GAP
B) Activation of a RhoA GEF
C) Inhibition of a RhoA GEF
D) Phosphorylation of RhoA
E) Ubiquitinylation of RhoA

Question

Quizplus · Accepted Answer

GEFs (guanine nucleotide exchange factors) promote the replacement of GDP with GTP, activating small GTPases such as RhoA.

Semaphorin Receptors (Called Plexins) Promote Growth Cone Collapse Via the Small