pH of lysosomes interior is

Options

A. `10-12`
B. `8-10`
C. `5-7`
D. `4-5`

Answer

### Step-by-Step Solution:

1. **Understanding Lysosomes**:
- Lysosomes are membrane-bound organelles found in eukaryotic cells. They contain hydrolytic enzymes that are crucial for breaking down waste materials and cellular debris.

2. **Function of Lysosomes**:
- They are often referred to as the "suicidal bags" of the cell because they can digest worn-out organelles and engulf pathogens, thus playing a key role in cellular cleanup and defense.

3. **pH of Lysosomes**:
- The interior of lysosomes is known to have a specific pH that is essential for the activity of the hydrolytic enzymes.

4. **Determining the pH Range**:
- The pH inside lysosomes is typically acidic. The commonly accepted pH range for lysosomes is between 4.5 to 5. This acidic environment is necessary for the optimal functioning of the digestive enzymes.

5. **Conclusion**:
- Based on the information about the pH of lysosomes, the correct answer to the question is that the pH of the lysosome's interior is **4 to 5**.