Which of the following is NOT a function of antibodies in defending against bacterial infections?

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Multiple Choice

Which of the following is NOT a function of antibodies in defending against bacterial infections?

Explanation:
Antibodies help defend against bacteria mainly by neutralizing toxins, tagging bacteria for destruction through opsonization, and activating the classical complement pathway to promote bacterial lysis or enhance clearance. They do not themselves directly rupture host cell membranes. The destruction of host cells is carried out by cytotoxic cells (like CD8+ T cells) or by other mechanisms, not by antibodies acting alone. So directly lysing host cells isn’t a function of antibodies in antibacterial defense.

Antibodies help defend against bacteria mainly by neutralizing toxins, tagging bacteria for destruction through opsonization, and activating the classical complement pathway to promote bacterial lysis or enhance clearance. They do not themselves directly rupture host cell membranes. The destruction of host cells is carried out by cytotoxic cells (like CD8+ T cells) or by other mechanisms, not by antibodies acting alone. So directly lysing host cells isn’t a function of antibodies in antibacterial defense.

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