Multiple choice

The immunoglobin, which is structured as dimer or sometimes tetramer along with secretory component (a polypeptide chain) is

  1. secretory IgG

  2. IgA

  3. IgD

  4. secretory IgA

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The IgA of external secretion like tears, colostrums, mucus, etc. consists of a dimer or tetramer with a J-chain and a polypeptide chain called secretory component.