Which statement about antibodies is accurate?

Which statement about antibodies is accurate?

• A. They bind to antigens on pathogens and help disable and clump for phagocytosis
• B. They create toxins to kill bacteria
• C. They are lipids
• D. They function as enzymes

Answer: (A)

Antibodies are proteins produced by B cells that bind specifically to antigens on pathogens. This binding can neutralize the invader and, more importantly, flag and clump pathogens together to make them easier for phagocytes to ingest (opsonization and agglutination). By coating pathogens, antibodies also help recruit other parts of the immune system to attack the invader. They are not toxins, lipids, or enzymes—their primary role is binding to antigens and guiding immune responses, not producing toxins, forming lipids, or catalyzing chemical reactions.

Antibodies are proteins produced by B cells that bind specifically to antigens on pathogens. This binding can neutralize the invader and, more importantly, flag and clump pathogens together to make them easier for phagocytes to ingest (opsonization and agglutination). By coating pathogens, antibodies also help recruit other parts of the immune system to attack the invader. They are not toxins, lipids, or enzymes—their primary role is binding to antigens and guiding immune responses, not producing toxins, forming lipids, or catalyzing chemical reactions.