The statements below outline how a macrophage carries out phagocytosis of a bacterium. 1 Digestive enzymes decompose the bacterium. 2 A lysosome fuses with the vacuole. 3 The macrophage exposes the bacterial antigens on its cell surface membrane. 4 The macrophage takes in the bacterium and places it inside a vacuole. 5 Receptors on the cell surface membrane of the macrophage attach to the bacterium. What is the correct sequence for phagocytosis?
- A3 → 5 → 4 → 1 → 2
- B4 → 2 → 1 → 5 → 3
- C5 → 4 → 2 → 1 → 3
- D5 → 4 → 3 → 1 → 2