Photosynthetic pigments of bacteria are located in

Options

A. Cytoplasm
B. Thylakoid membranes
C. Ribosomes
D. Chloroplast membrane.

Explanation

To answer the question regarding the location of photosynthetic pigments in bacteria, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Bacteria**:
- Bacteria are classified as prokaryotes, which means they lack membrane-bound organelles. This is an important characteristic that will help us eliminate some options.

2. **Evaluating the Options**:
- The options given are:
- A) Cytoplasm
- B) Thylakoid membrane
- C) Ribosome
- D) Chloroplast membrane

3. **Eliminating Incorrect Options**:
- **Chloroplast membrane**: Since bacteria are prokaryotic and do not have membrane-bound organelles, chloroplasts are absent. Therefore, this option can be eliminated.
- **Ribosome**: While ribosomes are present in bacteria, they are primarily the site of protein synthesis, not where photosynthetic pigments are located. Thus, this option is also incorrect.
- **Cytoplasm**: The cytoplasm does contain various components, including ribosomes, but it is not the specific site for photosynthetic pigments. Therefore, this option is not correct either.

4. **Identifying the Correct Option**:
- **Thylakoid membrane**: This is the correct answer. In some photosynthetic bacteria, thylakoid membranes are present within the cytoplasm and are specifically where photosynthetic pigments such as chlorophyll, xanthophyll, and carotene are located.

5. **Conclusion**:
- The photosynthetic pigments of bacteria are located in the **thylakoid membrane**.

### Final Answer:
The photosynthetic pigments of bacteria are located in the **thylakoid membrane**.

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