Question

Immunoglobulins are proteins that show structure.

• A. Primary
• B. Secondary
• C. Tertiary
• D. Quaternary

Answer 1

The correct option is D Quaternary

Immunoglobulins are large molecules made up of four peptide chains. It contains two identical heavy chains and two identical light chains, thus forming a tetrameric quaternary structure. The two heavy chains are linked to each other and to a light chain each by disulfide bonds. The resulting tetramer has two identical halves, which together form the Y-like shape.
Thus, the correct answer is option (D), 'Quaternary'.