The Steroid Hormones Testosterone, Estradiol, and Progesterone Enter Target Cells

The steroid hormones testosterone, estradiol, and progesterone enter target cells and bind intracellular receptors to regulate gene expression. Based on this information, which of the following statements about steroid hormones must be correct?

A) They are large and polar.
B) They are hydrophilic.
C) They are cationic or anionic, and they are water soluble.
D) They are mainly nonpolar and hydrophobic.

Correct Answer:

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