Q. Cytoribosomes of eucaryotes are different from those of bacterial cells in having

Options

A. a) Smaller size (70 S type)
B. b) Larger size (80 S type)
C. c) Differential chemical structure
D. d) All the above

Answer

To solve the question about how the cytoribosomes of eukaryotes differ from those of bacterial cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Basics of Ribosomes**:
- Ribosomes are the cellular structures responsible for protein synthesis. They can be found in both prokaryotic (bacterial) and eukaryotic cells.

2. **Identify the Types of Ribosomes**:
- Ribosomes are categorized based on their size, measured in Svedberg units (S).
- Prokaryotic ribosomes are classified as 70S, while eukaryotic ribosomes are classified as 80S.

3. **Compare Ribosome Sizes**:
- The 70S ribosomes found in bacteria are smaller than the 80S ribosomes found in eukaryotic cells. This is a key difference between the two types of cells.

4. **Consider Other Differences**:
- While the size is a primary difference, there are also variations in the chemical composition and structure of the ribosomes between prokaryotes and eukaryotes. However, the most notable difference is the size.

5. **Evaluate the Options**:
- Option A states "smaller size 70S type" which refers to prokaryotes, not eukaryotes.
- Option B states "larger size 80S type" which is correct for eukaryotes.
- Option C mentions "differential chemical structure," which is somewhat true but not the primary distinguishing factor.
- Option D states "all of the above," which is misleading since only option B is correct regarding eukaryotic ribosomes.

6. **Select the Correct Answer**:
- Based on the analysis, the correct answer is **Option B: larger size 80S type**.

### Final Answer:
The cytoribosomes of eukaryotes are different from those of bacterial cells in having a larger size, specifically the 80S type.

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