Which of the Following Pairs of Proteins Shares the Most

Question

Which of the following pairs of proteins shares the most overall similarity in structure?
A) T- cell receptors and antibodies
B) B- cell receptors and antibodies
C) B- cell receptors and T- cell receptors
D) antibodies and antigens

Accepted Answer

B-cell receptors and antibodies are both immunoglobulin proteins and share a high degree of similarity in structure, with the exception that antibodies have an additional constant region. T-cell receptors are structurally different from antibodies and B-cell receptors. Antibodies and antigens are not proteins, but rather the antigen is the target recognized by the protein antibodies.