The correct option is (c) 2 and 3 only.
Explanation
Lysosomes are membrane-bound vesicular structures found in eukaryotic cells. They are an integral part of the endomembrane system and are primarily responsible for intracellular digestion and waste disposal.
Statement-wise Analysis
- Statement 1 is Incorrect. Lysosomes are not formed by mitochondria. They are formed by the process of packaging in the Golgi apparatus. The Golgi apparatus modifies and packages proteins received from the Endoplasmic Reticulum into vesicles, some of which mature into lysosomes.
- Statement 2 is Correct. The isolated lysosomal vesicles are very rich in almost all types of hydrolytic enzymes (hydrolases – lipases, proteases, carbohydrases). These enzymes are synthesized by the Rough Endoplasmic Reticulum (RER) and are subsequently transported to the Golgi apparatus for processing before being packaged into lysosomes.
- Statement 3 is Correct. Lysosomes are often referred to as the "suicide bags" of the cell. If the cell gets damaged or during starvation, lysosomes may burst, and the released enzymes digest the cell's own organelles and components. This process is known as autolysis.
Key Takeaway: Lysosomes originate from the Golgi apparatus and contain hydrolytic enzymes synthesized by the Rough Endoplasmic Reticulum (RER). They function as the cell's waste disposal system and can trigger autolysis in damaged cells.