A hormone is hydrophobic and binds to membrane receptors. What type of molecule is this hormone most likely to be?

Question

Quizplus · Accepted Answer

Proteins are the class of molecules that typically bind to membrane receptors due to their ability to form complex structures that can interact with the cell's exterior environment. Hydrophobic hormones, such as steroid hormones, can pass through cell membranes but they typically bind to intracellular receptors, not membrane receptors. However, the question's phrasing suggests an exception or a misunderstanding, as hydrophobic molecules usually don't bind to membrane receptors; they typically pass through the membrane and bind to intracellular receptors. Given the options and the context, proteins are the most likely to be involved in signaling through membrane receptors, despite the initial description suggesting a hydrophobic nature. This might indicate a focus on the mechanism of action (binding to membrane receptors) rather than the physical properties of the hormone (hydrophobicity).

A Hormone Is Hydrophobic and Binds to Membrane Receptors