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Rating Newest Oldest. Best Answer: In biochemistry, a receptor is a protein molecule, embedded in either the plasma membrane or cytoplasm of a cell, to which a mobile signaling (or signal) molecule may attach.
The result is the tertiary structure or conformation of the protein, and it serves a unique, particular function. A receptor has a three-dimensional shape that enables it to bind with another molecule called a ligand (which might be a hormone, a neurotransmitter, etc.).inear chains of amino acids form proteins, and protein diversity arises from different amino acid combinations. Just as the twenty-six letters of the alphabet create a wide variety of words when combined, the twenty different amino acids create a variety of proteins when combined.