Which of the following statements is true of signal molecules?
A) When signal molecules first bind to receptor tyrosine kinases, the receptors phosphorylate a number of nearby molecules.
B) In response to some G protein-mediated signals, a special type of lipid molecule associated with the plasma membrane is cleaved to form IP₃ and calcium.
C) In most cases, signal molecules interact with the cell at the plasma membrane, enter the cell, and eventually enter the nucleus.
D) Protein kinase A activation is one possible result of signal molecules binding to G protein-coupled receptors.

Question

Quizplus · Accepted Answer

Protein kinase A activation is a common result of signal molecules binding to G protein-coupled receptors, often through the production of cAMP as a second messenger.

Which of the Following Statements Is True of Signal Molecules