Which of the Following is True of Steroid Receptor Interactions

Question

Which of the following is true of steroid receptor interactions?
A)The receptor molecules are themselves lipids.
B)The steroid can cross the plasma membrane.
C)The unbound steroid receptors are quickly recycled by lysosomes.
D)The concentration of steroid receptors must be relatively high in most cells.
E)The receptor molecules are free to move in and out of most organelles.

Accepted Answer

Steroids can cross the plasma membrane and bind to their intracellular receptors which are usually found in the cytoplasm or nucleus. The other options are incorrect as steroid receptors are usually proteins, are not recycled by lysosomes, and their concentration can vary depending on the cell type. Also, the receptors may be restricted to certain organelles like the nucleus in the case of nuclear receptors.