Which of the following subunit of ribosome is ribosome is composed of 23S rRNA and a 5S rRNA +32 different proteins
" " Or
The largest subunit of prokaryotic ribosomes is

Options

A. 30 S
B. 40 S
C. 50 S
D. 60 S

Answer

To solve the question, we need to identify the subunit of the ribosome that is composed of 23S rRNA, 5S rRNA, and 32 different proteins. The question also mentions that this subunit is the largest subunit of prokaryotic ribosomes.

### Step-by-Step Solution:

1. **Understanding Ribosome Structure**:
- Ribosomes are made up of two subunits: a larger subunit and a smaller subunit. In prokaryotes, these ribosomes are classified as 70S ribosomes.

2. **Identifying the Subunits**:
- The larger subunit in prokaryotic ribosomes is known as the 50S subunit.
- The smaller subunit is the 30S subunit.

3. **Components of the 50S Subunit**:
- The 50S subunit consists of:
- 23S ribosomal RNA (rRNA)
- 5S ribosomal RNA (rRNA)
- Approximately 32 different proteins

4. **Components of the 30S Subunit**:
- The 30S subunit consists of:
- 16S ribosomal RNA (rRNA)
- Around 21 different proteins

5. **Conclusion**:
- Since the question asks for the subunit composed of 23S rRNA, 5S rRNA, and 32 different proteins, we can conclude that this refers to the 50S subunit of prokaryotic ribosomes.
- Therefore, the answer to the question is the 50S subunit.

### Final Answer:
The largest subunit of prokaryotic ribosomes is the **50S subunit**, which is composed of 23S rRNA, 5S rRNA, and approximately 32 different proteins.

---