The Organic Molecule in Cell Membranes That Forms Receptor Sites

Question

The organic molecule in cell membranes that forms receptor sites for hormones is:
A)pentose sugar
B)protein
C)phospholipids
D)cholesterol

Accepted Answer

The organic molecule in cell membranes that forms receptor sites for hormones is a protein. Proteins such as G-protein-coupled receptors and ion channel receptors are embedded in the phospholipid bilayer of the cell membrane and have specific binding sites for hormones, neurotransmitters, and other signaling molecules. Pentose sugars and phospholipids are also components of cell membranes but do not directly form receptor sites for hormones. Cholesterol is a type of lipid that helps to stabilize the cell membrane but does not form receptor sites for hormones.