A)Stimulating the dimerization and transphosphorylation of the receptors.
B)Turning off downstream signaling.
C)Promoting mitogenic signaling.
D)A and C.
E)None of the above.

A)Src operates as a protein kinase.
B)Src phosphorylates ADP to make ATP.
C)Src can serve as a kinase substrate.
D)A and C.
E)None of the above.

A)Mutations often occur at codons 12,13,or 61.
B)Oncogenic mutations usually result in higher levels of GDP-bound Ras.
C)Oncogenic mutations usually result in higher levels of GTP-bound Ras.
D)Cells often have compromised activity of GTPase-activating proteins GAPs).
E)None of the above.