Q. Why are the receptors for amino acid-based hormones on the outside surface of the cell membrane?
A. cells can respond faster when the hormone does not need to enter the cell.
B. amino acid-based hormones cannot penetrate cell membranes.
C. lysosomes in the intracellular fl uid digest amino acid-based hormones.
D. amino acid-based hormones have no role in activating genes in the nucleus.
Answer: amino acid-based hormones cannot penetrate cell membranes.