Which statement about receptors is true?
A) Receptors are found only on the surface of a cell.
B) A receptor is specific to a signal ligand.
C) Most receptors can bind many different signal ligands.
D) Most receptors have no connection to a signal transduction pathway.
E) Most receptors bind molecules that can diffuse through the cell membrane.

Question

Quizplus · Accepted Answer

Receptors are proteins that are specific to a particular signal ligand. They bind to the ligand and initiate a cellular response.

Answer: C 
 While receptors are specific to a particular signal ligand, many receptors can bind to multiple related ligands. This allows for more versatility in cellular signaling.

Answer: E 
 Some receptors can bind to molecules that can diffuse through the cell membrane, such as steroids or gases. However, this is not true for all receptors.

Which Statement About Receptors Is True