alleryStart learning →After a macrophage engulfs a bacterium, the resulting vesicle fuses with what?
AA lysosome
BA ribosome
CA peroxisome
DA centriole
Answer & Solution
Correct answer: A. A lysosome
1. The invaginated section pinches off from the plasma membrane and becomes a vesicle with the pathogen inside.
2. That vesicle then fuses with a lysosome.
3. The hydrolytic enzymes of the lysosome destroy the pathogen.
4. Lysosomes therefore serve immunity as well as digestion and organelle recycling.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.4 The Endomembrane System and Proteins_
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