Ribosomes are particles about `200 Å` units in diameter consisting of protein and RNA . The percentage of Protein and RNA in eukaryotes is

Options

A. 80% and 20%
B. 60 % and 40 %
C. 50 % and 50 %
D. 40 % and 60 %

Answer

To solve the question regarding the percentage of protein and RNA in eukaryotic ribosomes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Composition of Ribosomes**: Ribosomes are cellular structures made up of ribosomal RNA (rRNA) and proteins. They play a crucial role in protein synthesis.

2. **Identify the Key Information**: The question specifies that we are focusing on eukaryotic ribosomes. We need to determine the percentage of protein and RNA in these ribosomes.

3. **Recall Known Values**:
- In prokaryotic ribosomes, the composition is approximately 40% protein and 60% RNA.
- For eukaryotic ribosomes, the composition is different.

4. **Determine Eukaryotic Ribosome Composition**:
- It is known that in eukaryotic ribosomes, the protein content is higher compared to prokaryotic ribosomes.
- The typical composition of eukaryotic ribosomes is about 60% protein and 40% RNA.

5. **Match with Given Options**: The options provided are:
- a) 80% and 60%
- b) 60% and 40%
- c) 50% and 50%
- d) 40% and 60%

From our understanding, the correct composition of eukaryotic ribosomes is 60% protein and 40% RNA.

6. **Select the Correct Answer**: Based on the analysis, the correct answer is option **b) 60% and 40%**.

### Final Answer:
The percentage of protein and RNA in eukaryotic ribosomes is **60% protein and 40% RNA**.

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