Synthesis of cycline protein occurs in:-

Options

A. Permanent tissue
B. Meristem
C. Lignified cells
D. All the types of cells

Answer

To determine where the synthesis of cyclin protein occurs, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Cyclins**: Cyclins are proteins that play a crucial role in regulating the cell cycle. They activate cyclin-dependent kinases (CDKs), which are essential for the progression of cells through different phases of the cell cycle.

2. **Identifying Tissue Types**: The question provides several options regarding where cyclin synthesis occurs. We need to evaluate each option based on the characteristics of the tissues mentioned.

3. **Evaluating Permanent Tissue**: The first option is "permanent tissue." Permanent tissues are differentiated cells that have a specific function and do not divide frequently. Since cyclins are involved in cell division, this option is incorrect.

4. **Evaluating Meristematic Tissue**: The second option is "meristem." Meristematic tissues consist of undifferentiated cells that are actively dividing. This is where rapid cell division occurs, making it the most likely site for cyclin synthesis. Therefore, this option is correct.

5. **Evaluating Lignified Cells**: The third option is "lignified cells." Lignified cells are specialized cells that have undergone differentiation and are typically involved in providing structural support. These cells do not actively divide, so this option is also incorrect.

6. **Evaluating All Types of Cells**: The last option is "all types of cells." While cyclins are present in various cell types, the synthesis of cyclins is particularly associated with actively dividing tissues. Therefore, this option is too broad and incorrect in the context of the question.

7. **Conclusion**: Based on the evaluation of the options, the synthesis of cyclin protein occurs in "meristematic tissue," which is the correct answer.

### Final Answer:
The synthesis of cyclin protein occurs in **meristematic tissue**.

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