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Multiple Choice

Secondary lysosomes digest food particles brought into the cell as well as old organelles (autophagy). Which process describes this activity?

The activity described is autophagy. When the cell targets its own worn-out or damaged organelles, it wraps them in a double-membrane structure to form an autophagosome. This autophagosome fuses with a lysosome (forming a secondary lysosome), and the lysosomal enzymes digest the organelle contents into basic nutrients that the cell can reuse. The mention of digesting food particles brought into the cell is related to phagocytosis, which also ends in lysosomal digestion, but autophagy specifically covers the breakdown of internal cellular components like old organelles. This is why autophagy is the best fit for the process described.

The activity described is autophagy. When the cell targets its own worn-out or damaged organelles, it wraps them in a double-membrane structure to form an autophagosome. This autophagosome fuses with a lysosome (forming a secondary lysosome), and the lysosomal enzymes digest the organelle contents into basic nutrients that the cell can reuse. The mention of digesting food particles brought into the cell is related to phagocytosis, which also ends in lysosomal digestion, but autophagy specifically covers the breakdown of internal cellular components like old organelles. This is why autophagy is the best fit for the process described.