Microbiology General 1a446593 False about Immunoglobulins is A Y shaped heterodimer composed of four polypeptide chains B All four H and L chains are bound to each by disulfide bonds C Antibody contains two types of light chain and one type of heavy chain D There are 5 classes of H chains and two classes of light chains High-Yield Explanation Any antibody contains one type of light chain and one type of heavy chain.