The outer part of the enzyme-linked receptor has a binding site for a signaling molecule, and the part of the receptor that extends into the cytosol has a binding site for a specific G protein.
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Question

The outer part of the enzyme-linked receptor has a binding site for a signaling molecule, and the part of the receptor that extends into the cytosol has a binding site for a specific G protein. 
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Quizplus · Accepted Answer

Enzyme-linked receptors, also known as receptor tyrosine kinases, do not have a binding site for G proteins. Instead, they have an intrinsic enzyme activity or are directly associated with enzymes that they activate upon ligand binding. G protein-coupled receptors (GPCRs), not enzyme-linked receptors, have a binding site for G proteins.

The Outer Part of the Enzyme-Linked Receptor Has a Binding