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

question 32

Multiple Choice

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 disrupting downstream signaling events.
• B)GDP would remain bound to Ras,thereby disrupting downstream signaling events.
• C)GTP would remain bound to Ras,leading to overstimulation of the Ras pathway.
• D)GDP would remain bound to Ras,leading to overstimulation of the Ras pathway.

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A specialized accounting journal used to record all receipts of cash.

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