Q.

Identify the statement that is NOT correct.               [2025]

1 Antigen binding site is located at C-terminal region of antibody molecules.  
2 Constant region of heavy and light chains are located at C-terminus of antibody molecules.  
3 Each antibody has two light and two heavy chains.  
4 The heavy and light chains are held together by disulfide bonds.  

Ans.

(1)