Which of the Following Immunoglobulins is the Largest and Heaviest

Question

Which of the following immunoglobulins is the largest and heaviest?
A) IgM
B) IgG
C) IgD
D) IgE
E) IgA

Accepted Answer

IgM is the largest and heaviest immunoglobulin, primarily because it primarily exists as a pentamer in the serum, making it significantly larger and heavier than the other types of immunoglobulins.