Subunits of prokaryotic ribosomes are

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Ribosomes**: Ribosomes are cellular structures responsible for protein synthesis. They are made up of ribosomal RNA (rRNA) and proteins.

2. **Prokaryotic vs Eukaryotic Ribosomes**: Ribosomes differ between prokaryotes and eukaryotes. In eukaryotic cells, ribosomes are classified as 80S, while in prokaryotic cells, they are classified as 70S.

3. **Components of Prokaryotic Ribosomes**: The "S" in the classification stands for Svedberg units, which measure the rate of sedimentation during centrifugation, reflecting the size and density of the ribosomal subunits.

4. **Subunits of Prokaryotic Ribosomes**: The prokaryotic ribosome (70S) is composed of two subunits:
- The larger subunit is 50S.
- The smaller subunit is 30S.

5. **Final Answer**: Therefore, the subunits of prokaryotic ribosomes are 50S and 30S.

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