State whether the following statements are true or false. Bacterial and eukaryotic thylakoids are involved in photosynthesis.

Answer

To determine whether the statement "Bacterial and eukaryotic thylakoids are involved in photosynthesis" is true or false, we can break down the components of the statement step by step.

### Step-by-Step Solution:

1. **Understanding Thylakoids**:
- Thylakoids are membrane-bound structures found in chloroplasts of eukaryotic cells and are involved in the light-dependent reactions of photosynthesis.

2. **Eukaryotic Thylakoids**:
- In eukaryotic organisms, thylakoids are present in chloroplasts, which are double-membraned organelles. The thylakoids are arranged in stacks known as grana.

3. **Bacterial Thylakoids**:
- In bacteria, particularly photosynthetic bacteria, thylakoid-like structures can be found. However, these are not true thylakoids as seen in eukaryotes; instead, they are folded regions of the plasma membrane that perform similar functions.

4. **Photosynthesis in Eukaryotes**:
- Photosynthesis in eukaryotic organisms occurs in chloroplasts, where thylakoids play a crucial role in capturing light energy.

5. **Photosynthesis in Bacteria**:
- In bacteria, photosynthesis occurs in the plasma membrane or in specialized structures that resemble thylakoids, but they are not classified as true thylakoids.

6. **Conclusion**:
- The statement claims that both bacterial and eukaryotic thylakoids are involved in photosynthesis. Since bacterial thylakoids are not true thylakoids like those in eukaryotes, the statement is **false**.

### Final Answer:
The statement "Bacterial and eukaryotic thylakoids are involved in photosynthesis" is **false**.

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