Question

Which antibody function involves the activation of complement proteins that lead to the lysis of pathogens?

Options

• Secretory protection

• Opsonisation

• Agglutination

• Complement fixation

Answer 1

Complement fixation is the process by which antibodies, particularly IgM and IgG, bind to pathogens and activate complement proteins. This activation leads to a cascade of reactions that ultimately results in the lysis (rupture) and destruction of the pathogen cell membrane.