Which of the following processes generally requires protein phosphorylation?
A) activation of receptor tyrosine kinases
B) activation of steroid hormone receptors
C) activation of G protein-coupled receptors
D) activation ligand-gated ion channels

Question

Quizplus · Accepted Answer

Activation of receptor tyrosine kinases typically involves phosphorylation of the receptor itself and downstream signaling molecules.

Answer: D 
 Ligand-gated ion channels can be activated by phosphorylation of the receptor or associated proteins. However, this is not a universal requirement for activation of all types of ligand-gated ion channels.

Option B and C are not correct because activation of steroid hormone receptors and G protein-coupled receptors typically do not require protein phosphorylation for activation. Time-dependent changes such as phosphorylation can affect their functions, but their activation typically occurs through ligand binding.

Which of the Following Processes Generally Requires Protein Phosphorylation