When a steroid hormone and a peptide hormone exert similar effects on a population of target cells, then
A) the steroid and peptide hormones must use the same biochemical mechanisms.
B) the steroid and peptide hormones must bind to the same receptor protein.
C) the steroid hormones affect the synthesis of effector proteins, whereas peptide hormones activate effector proteins already present in the cell.
D) the steroid hormones affect the activity of certain proteins within the cell, whereas peptide hormones directly affect the processing of mRNA.
E) the steroid hormones affect only the release of proteins from the target cell, whereas peptide hormones affect only the synthesis of proteins that remain in the target cell.

Question

Quizplus · Accepted Answer

Steroid hormones enter the nucleus of target cells and affect gene expression, leading to the synthesis of effector proteins. Peptide hormones, on the other hand, bind to receptors on the cell membrane and activate effector proteins that are already present in the cell. Therefore, when steroid and peptide hormones exert similar effects on a population of target cells, it is likely that the steroid hormones are affecting the synthesis of effector proteins, similar to how peptide hormones activate them.

When a Steroid Hormone and a Peptide Hormone Exert Similar