A student coming out cell fractionation of a tissue and forgot to label his tubes. The contents of one tube when studied showed organelles bounded by membrane with activity of catalase enzyme. These organelles could be :-

Options

A. SER
B. Chloroplast
C. Lysosome
D. Perosisome

Answer

To solve the question regarding the organelles observed in a tube after cell fractionation, we need to analyze the information provided about the organelles and their characteristics. Here's a step-by-step solution:

### Step-by-Step Solution:

1. **Understanding Cell Fractionation**:
- Cell fractionation is a technique used to separate cellular components based on their size and density. This allows for the study of individual organelles.

2. **Identifying the Key Characteristics**:
- The problem states that the organelles are "bounded by membrane" and exhibit "activity of catalase enzyme."
- Catalase is an enzyme that breaks down hydrogen peroxide into water and oxygen, indicating a specific function related to detoxification.

3. **Analyzing the Options**:
- **Option A: SCR (Smooth Endoplasmic Reticulum)**: While it is membrane-bound, it does not typically contain catalase.
- **Option B: Chloroplast**: Chloroplasts are involved in photosynthesis and contain enzymes related to that process, but they do not primarily function with catalase.
- **Option C: Lysosome**: Lysosomes contain digestive enzymes but are not known for catalase activity.
- **Option D: Peroxisome**: Peroxisomes are membrane-bound organelles that contain catalase and are involved in the breakdown of hydrogen peroxide.

4. **Conclusion**:
- Based on the analysis, the organelles that are membrane-bound and exhibit activity of catalase enzyme are **Peroxisomes**. Therefore, the correct answer is **Option D: Peroxisome**.