Question

Select the correct option for types of lysosomes.

• A. P - Primary lysosome ; Q - Residual body ; R - Digestive vacuole ; S - Autophagosome
• B. P - Autophagosome ; Q - Primary lysosome ; R - Residual body ; S - Secondary lysosome
• C. P - Primary lysosome ; Q - Digestive vacuole ; R - Residual body ; S - Autophagic vacuole
• D. P - Residual body ; Q - Digestive vacuole ; R - Primary lysosome ; S - Autophagosome

Answer 1

The correct option is C P - Primary lysosome ; Q - Digestive vacuole ; R - Residual body ; S - Autophagic vacuole

Lysosomes are an important cellular organelle that receive and degrade macromolecules from the secretory, endocytic, autophagic, and phagocytic membrane-trafficking pathways.
- Primary lysosome contains inactive enzymes
- Secondary lysosome or digestive vacuole is formed by fusion of primary lysosome with phagocytic vesicle. It contains active enzymes.
- Residual bodies are formed after digestion. They contain undigested products.
- Autophagic vacuoles / autophagosome is formed by fusion of old organelle and lysosome and it helps in apoptosis.