What is the role of lysosomes in the cell?

• A. They synthesize proteins
• B. They digest cellular waste and macromolecules using hydrolytic enzymes
• C. They generate ATP
• D. They store genetic information

Answer: (B)

Lysosomes act as the cell’s recycling centers, housing hydrolytic enzymes that break down cellular waste and macromolecules. Inside, acidic conditions optimize these enzymes to cleave proteins, nucleic acids, lipids, and carbohydrates, allowing damaged organelles or material taken from outside the cell to be digested. The lysosome is membrane-bound to keep these powerful enzymes separate from the rest of the cytoplasm, preventing accidental damage. Through processes like autophagy and endocytosis, unwanted components are delivered to lysosomes, digested, and the resulting nutrients recycled for the cell’s use.

Protein synthesis happens in ribosomes on the rough endoplasmic reticulum or in the cytosol, generating new proteins. ATP is produced mainly in mitochondria during cellular respiration, not lysosomes. The genetic information is stored in DNA within the nucleus.