Biology

The correct answer is: A.Conform to the shape of the ligand

Explanation:

Receptors are highly specific proteins that bind to signaling molecules (ligands) with high affinity. For a receptor to bind to its ligand, the shape of the receptor must match or "fit" the shape of the ligand, similar to a lock and key model. This interaction triggers a cellular response, such as activating a signaling pathway.

Here's a breakdown of the ...