Which of the following aid in the killing of intracellular bacteria?: (A) Histamine, (B) Interleukin-2, (C) Catalase, (D) Lysozyme
Answer is D. Bacteria that are phagocytosed by macrophages are kept in membrane-bound vacuoles called phagosomes. A phagosome will fuse with a lysosome, which contains many degradative enzymes, including lysozyme.