試題詳解

17. One distinction between peptide and steroid hormones is that steroid hormones:
(A) bind to their receptors wMi low affinity, whereas peptide hormones bind with high affinity.
(B) bind to intracellular receptors, whereas p啪de hormones bind to cell surfoce receptors.
(C) are less stable than peptide hormones.
(D) are generally water-soluble, whereas peptide hormones are water-insoluble.
(E) act through specific receptors, whereas peptide hormones act through nonspecific receptors.