In bacteria, catalytic RNA is found in

Options

A. 60S subunit of ribosome .
B. 50S subunit of ribosome
C. 30S subunit of ribosome
D. 40S subunit of ribosome

Answer

### Step-by-Step Solution:

1. **Understanding Ribosomes in Bacteria**:
- Bacterial ribosomes are categorized as 70S ribosomes, which are different from eukaryotic ribosomes. The "S" refers to the Svedberg unit, a measure of sedimentation rate during centrifugation.

2. **Components of Bacterial Ribosomes**:
- The 70S ribosome is composed of two subunits: the larger 50S subunit and the smaller 30S subunit.

3. **Further Division of Subunits**:
- The 50S subunit is further divided into two types of RNA: 5S rRNA and 23S rRNA.
- The 30S subunit contains 16S rRNA.

4. **Identifying Catalytic RNA**:
- Catalytic RNA, also known as ribozymes, are RNA molecules that have the ability to catalyze biochemical reactions.
- In bacteria, the catalytic RNA is specifically found in the 23S rRNA, which is part of the 50S ribosomal subunit.

5. **Conclusion**:
- Therefore, the correct answer to the question "In bacteria, catalytic RNA is found in" is the **50S subunit of the ribosome**.

### Final Answer:
The catalytic RNA in bacteria is found in the **50S subunit of the ribosome**.

---