|Class 9 Biology Fundamental Unit of Life||Lysosomes|
The sac-like structures in a cell surrounded by membrane are called lysosomes.
They keep the cells clean by digesting and breaking the outside materials like bacteria, food entering the cell or worn-out cell organelles into small pieces.
They can digest these organic materials due to the presence of strong digestive enzymes that can brreak down organic compounds. Therefore, lysosome is also known as a suicide sac.
Many scientists believe that lysosomes are not present in plant cells and their function of lysosomes in plants is performed by vacuole.