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

### Step 2: Identify the Percentage of Components
In eukaryotic ribosomes, the composition is generally accepted as:
- **RNA**: Approximately 60%
- **Protein**: Approximately 40%

### Step 3: Analyze the Options
Given the percentages, we can evaluate the provided options:
- **Option A**: 80% protein, 20% RNA - Incorrect
- **Option B**: 60% protein, 40% RNA - Incorrect (this is the reverse)
- **Option C**: 50% protein, 50% RNA - Incorrect
- **Option D**: 40% protein, 60% RNA - Correct

### Step 4: Conclusion
The correct answer is that in eukaryotic ribosomes, the percentage of protein is 40% and the percentage of RNA is 60%.

### Final Answer:
- **Protein**: 40%
- **RNA**: 60%

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