What is the primary function of lysosomes in a cell?

• A. Production of energy through cellular respiration
• B. Digestion of excess or worn-out organelles and waste removal
• C. Synthesis and modification of proteins
• D. Storage of nutrients and structural support

Answer: (B)

Lysosomes play a critical role in cellular maintenance and waste management. Their primary function is to digest excess or worn-out organelles, as well as to break down waste materials, including macromolecules and cellular debris. They contain a variety of hydrolytic enzymes that are capable of breaking down proteins, lipids, carbohydrates, and nucleic acids. This digestive capability allows lysosomes to recycle cellular components, providing materials that can be reused by the cell, and helps in eliminating potentially harmful substances. The proper functioning of lysosomes is vital for maintaining cellular health and homeostasis, and a dysfunction can lead to various diseases, often related to the accumulation of waste within cells.