Which of the Following Is True Regarding the GTPase Activity

question 7

Multiple Choice

Which of the following is true regarding the GTPase activity of Ras proteins?

• A) under normal conditions, the GTPase activity is very high with most Ras proteins kept in an inactive state
• B) Ras proteins have no inherent GTPase activity and rely upon the binding of GTPase-activating protein
• C) mutations of the Ras protein cause GTPase activity to be extremely low
• D) the GTPase-activating protein is inhibited by cAMP
• E) none of the above

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