8. What are themain functional regions of a cell? Explain with the help of a diagram.

The main functional regions of a cell are:

1. Nucleus: This is the control center of the cell, containing the cell's DNA. It regulates the cell's activities and is responsible for cell reproduction.

2. Cytoplasm: This is the jelly-like substance that fills the cell. It contains all the organelles and provides a medium for biochemical reactions to take place.

3. Mitochondria: These are the powerhouses of the cell, producing energy through the process of respiration.

4. Endoplasmic Reticulum (ER): This is a network of tubules involved in protein and lipid synthesis.

5. Golgi Apparatus: This organelle modifies, sorts, and packages proteins and lipids for transport.

6. Lysosomes: These are the cell's waste disposal system, breaking down waste materials and cellular debris.

7. Ribosomes: These are the sites of protein synthesis.

8. Cell Membrane: This is the outer layer of the cell, controlling the movement of substances in and out of the cell.

9. Vacuoles: These are storage organelles, holding water, nutrients, and waste products.

Unfortunately, I can't provide a diagram as I'm a text-based AI. However, you can easily find diagrams of cell structure in textbooks or online.