[Campbell Biology P.1008] According to Figure 43.11 and the accompanying text, which statemen... | Practice Question

According to Figure 43.11 and the accompanying text, which statement accurately describes the structure of a T cell antigen receptor?

• A: It is composed of four polypeptide chains, including two identical heavy chains and two identical light chains.
• B: It is made up of a single polypeptide chain with both variable and constant regions.
• C: It consists of an alpha chain and a beta chain linked by a disulfide bridge, with variable regions forming the antigen-binding site and constant regions anchoring it to the plasma membrane.
• D: It comprises an alpha chain and a beta chain linked by a disulfide bridge, with variable regions forming the antigen-binding site and a transmembrane region anchoring the molecule in the plasma membrane.