The protein SOS is a guanine nucleotide exchange factor for Ras.SOS helps facilitate the exchange of GDP for GTP.What would be the effect of a mutation that inhibits the interaction between SOS and Ras?
A)GTP would remain bound to Ras,thereby keeping Ras constitutively active.
B)GDP would remain bound to Ras,thereby preventing Ras activation.
C)Ras would be more likely to hydrolyze GTP to GDP.
D)There would be no effect.

Question

Quizplus · Accepted Answer

If the interaction between SOS and Ras is inhibited, then SOS would not be able to help facilitate the exchange of GDP for GTP. As a result, GDP would remain bound to Ras, thereby preventing Ras activation.

The Protein SOS Is a Guanine Nucleotide Exchange Factor for Ras.SOS