What is the origin of virtually all of the signals that regulate cellular activities?
A)the cell surface
B)the nucleus
C)the nucleolus
D)the endoplasmic reticulum
E)the cell wall

Question

Quizplus · Accepted Answer

Signals that regulate cellular activities come from outside the cell and typically interact with receptors on the cell surface. Therefore, choice A (the cell surface) is the origin of virtually all of these signals.

What Is the Origin of Virtually All of the Signals