Each of the following is true about Ras except
A) Ras is monomeric.
B) Ras activity is inhibited by GTPase activating proteins (GAPs).
C) Ras binds steroid hormones.
D) Ras is activated by Sos, a guanine nucleotide exchange factor.
E) Ras activates a cascade of phosphorylation events within the cell.
Answer: C
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