Mesokaryon is characterised by the presence of

Options

A. Condensed chromosome in interphase
B. Histone proteins
C. Nuclear membrane
D. Nucleus

Answer

To answer the question regarding what characterizes a mesokaryon, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Mesokaryon**:
- A mesokaryon is a type of cell characterized by certain features in its nucleus. It is important to know the specific characteristics that define it.

2. **Analyzing the Options**:
- The question provides several options to choose from. We need to evaluate each option to determine which one correctly describes a mesokaryon.

3. **Option 1: Condensed Chromosomes in Interphase**:
- This option states that mesokaryon is characterized by the presence of condensed chromosomes during interphase.
- In a mesokaryon, the chromosomes are indeed condensed during interphase, which is a defining feature.

4. **Option 2: Histone Proteins**:
- Histone proteins are involved in the structural support of chromosomes but are not a defining characteristic of mesokaryon itself. Therefore, this option is incorrect.

5. **Option 3: Nuclear Membrane**:
- The nuclear membrane is a standard feature of all eukaryotic cells and does not specifically characterize mesokaryon. Hence, this option is also incorrect.

6. **Option 4: Nucleus**:
- While the nucleus is a fundamental part of eukaryotic cells, it does not specifically characterize mesokaryon. Thus, this option is incorrect as well.

7. **Conclusion**:
- Based on the analysis, the correct answer is **Option 1: Condensed Chromosomes in Interphase**. This is the defining characteristic of a mesokaryon.

### Final Answer:
Mesokaryon is characterized by the presence of **condensed chromosomes in interphase**.

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