Which of the following statements are incorrect about receptor proteins?

Options

A. Majority of receptor protein are embedded in the cell membranes
B. The active site of receptor proteins opens on the inside region of the cell
C. Chemical messengers are received at the binding sites of receptor proteins
D. Shape of receptor doesn't change during attachment of messenger

Answer

B, D

Explanation

Receptors are proteins that are crucial to body's communication process. Majority of these are embedded in cell membranes. They are embedded in the cell membrane in such a way that their small part possessing active site projects out of the surface of the membrane and opens on the outside region of the cell membrane.
In the body massage between two neurons and that between neuron to muscles is communicated through certain chemicals. These chemicals, known as chemical messengers are received at the binding site of receptors proteins.
To accommodate a messenger, shape of the receptr site changes. This brings about the transfer of massage into the cell. Thus, chemical messenger gives message to the cell without entering the cell.