Which of the Following is True About Signal Transduction by Hormones

Question

Which of the following is true about signal transduction by hormones?
A) All hormones are linear chains of amino acids (peptides).
B) Hormones can diffuse freely in and out of cells.
C) Steroid hormone-receptor complexes can enter the cell nucleus.
D) Peptide hormones directly act on DNA to stimulate transcription.
E) Binding of a peptide hormone to its receptor causes a conformational change in the hormone molecule.

Accepted Answer

Steroid hormone-receptor complexes can indeed enter the cell nucleus. This is because steroid hormones are lipid-soluble and can pass through the cell membrane to bind to their receptors inside the cell. The hormone-receptor complex then moves into the nucleus to act on specific genes, influencing transcription.