In general, all cell signaling causes
A) increased expression of genes.
B) an influx of ions.
C) protein kinase activity.
D) G protein activation.
E) a change in receptor conformation.

Question

Quizplus · Accepted Answer

All cell signaling pathways involve some sort of change in receptor conformation. This can include ligand binding and activation of intracellular signaling cascades, or inhibition of signaling through negative feedback mechanisms. Regardless of the specific mechanism, the end result is a change in the shape or activity of the receptor protein, which then triggers downstream signaling events. While the other choices may also be involved in some types of cell signaling, they are not universally applicable and therefore not the best choice.

In General, All Cell Signaling Causes