At the centre, pyrenoid consists of

Options

A. Fat
B. Starch
C. Protein
D. Enzyme

Answer

To answer the question "At the centre, pyrenoid consists of," we can follow these steps:

### Step-by-Step Solution:

1. **Define Pyrenoid**:
- A pyrenoid is a structure found within the chloroplasts of certain algae. It plays a crucial role in the process of photosynthesis and carbon fixation.

2. **Components of Pyrenoid**:
- The pyrenoid is primarily composed of two main components: starch and proteins.

3. **Structure of Pyrenoid**:
- The core of the pyrenoid consists of proteins. This protein core is essential for the function of the pyrenoid.
- Surrounding this core, there is a layer of starch. This starch serves as a storage form of energy.

4. **Function of Pyrenoid**:
- The pyrenoid aids in the fixation of carbon dioxide during photosynthesis, which is vital for the survival of algae.

5. **Conclusion**:
- Therefore, at the center of the pyrenoid, we find proteins, while the surrounding layer consists of starch.

### Final Answer:
At the center, the pyrenoid consists of proteins.

---