the Ras and MAP kinase pathway starts with the binding of a growth factor to a receptor. as a result, all of the following occur EXCEPT?
a. the tyrosine kinase of the receptor I activated.
b. the receptor undergoes auto phosphorylation
c. Grb2 is activated by binding to portions of the receptors that have phosphorylated tyrosyl residue.
d. Grb2 binds because it has a src homology 2 domain (SH2 domain)
e. Eventually, Ras, a G-protein is activated by binding to GMP