Ribosomes are the actual sites for the synthesis of …….

Explanation

**Step-by-Step Solution:**

1. **Understanding Ribosomes**: Ribosomes are cellular structures that play a crucial role in the synthesis of proteins. They can be found in both prokaryotic and eukaryotic cells.

2. **Types of Ribosomes**: In eukaryotic cells, ribosomes are of the 80S type, while in prokaryotic cells, they are of the 70S type. The "S" refers to the Svedberg unit, which measures the rate of sedimentation during centrifugation, indicating size and density.

3. **Location of Ribosomes**: Ribosomes can be found freely floating in the cytoplasm or attached to the rough endoplasmic reticulum (RER). The RER is involved in the synthesis and processing of proteins.

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