In prokaryotes, there are no membrane bound organelles.

Answer

### Step-by-Step Solution:

1. **Understanding Prokaryotes**:
- Prokaryotic cells are defined as cells that lack a true nucleus and membrane-bound organelles. The term "prokaryote" comes from the Greek words "pro" meaning primitive and "karyon" meaning nucleus.

2. **Characteristics of Prokaryotic Cells**:
- Prokaryotic cells are generally simpler and smaller than eukaryotic cells. They do not have a defined nucleus; instead, their genetic material is located in a region called the nucleoid.

3. **Absence of Membrane-Bound Organelles**:
- In prokaryotes, there are no membrane-bound organelles. This means that structures such as mitochondria, endoplasmic reticulum, and Golgi apparatus, which are found in eukaryotic cells, are absent in prokaryotic cells.

4. **Ribosomes in Prokaryotes**:
- The only organelles present in prokaryotic cells are ribosomes, which are not membrane-bound. Ribosomes are essential for protein synthesis.

5. **Comparison with Eukaryotes**:
- In contrast, eukaryotic cells have a well-defined nucleus and various membrane-bound organelles, such as mitochondria, chloroplasts, and lysosomes, which perform specific functions within the cell.

### Final Statement:
Thus, the statement "In prokaryotes, there are no membrane-bound organelles" is true.

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