Protein Phosphorylation is Commonly Involved with All of the Following

Question

Protein phosphorylation is commonly involved with all of the following except
A)regulation of transcription by extracellular signalling molecules.
B)enzyme activation.
C)activation of G protein-coupled receptors.
D)activation of receptor tyrosine kinases.
E)activation of protein kinase molecules.

Accepted Answer

While protein phosphorylation can be involved in many cellular processes, including enzyme activation, activation of receptor tyrosine kinases, and activation of protein kinase molecules, it is not directly involved in the activation of G protein-coupled receptors. These receptors are activated by ligand binding, not by phosphorylation.