Which of the Following Steps in a Signaling Cascade Initiated

question 103

Multiple Choice

Which of the following steps in a signaling cascade initiated by a G protein-coupled receptor would be DIRECTLY affected in cells cultured in the presence of a non-hydrolyzable ATP analog (the analog could bind to other molecules, but could not be converted to ADP and P_i) ?

• A)protein phosphatase activity
• B)protein kinase activity
• C)adenylyl cyclase activity
• D)phosphodiesterase activity

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