In many signaling pathways, once a signaling molecule binds to a receptor, the receptor becomes phosphorylated. This initial phosphorylation step BEST demonstrates:
A)receptor activation.
B)signal transduction.
C)cellular response.
D)termination.
E)either cellular response or signal transduction.

Question

Quizplus · Accepted Answer

Phosphorylation of the receptor is the first step in activating the receptor, allowing it to initiate the downstream signaling pathway. This is known as receptor activation.

In Many Signaling Pathways, Once a Signaling Molecule Binds to a Receptor