Question

The portion of the transmembrane receptor that binds to hydrophilic messengers is termed the ________?

1) receptor-binding domain
2) transmembrane domain
3) ligand-binding domain
4) intracellular domain

Answer 1

The portion of the transmembrane receptor that binds to hydrophilic messengers is called the ligand-binding domain.

Step-by-step explanation:

The portion of the transmembrane receptor that binds to hydrophilic messengers is termed the ligand-binding domain.

Each cell-surface receptor has three main components: an external ligand-binding domain, a hydrophobic transmembrane domain, and an intracellular domain. The ligand-binding domain, also known as the extracellular domain, is responsible for binding to hydrophilic ligands such as hormones or neurotransmitters.