Assertion : Archaebacteria are more similar to eukaryotes rather than eubacteria.
Reason : Archaean genome is more similar to eukaryotic genome rather than bacterial genome

Options

A. (a) If both assertion and reason are true and reason is the correct explanation of assertion.
B. (b) If both assertion and reason are true but reason is not the correct explanation of assertion.
C. (c) If assertion is true but reason is false.
D. (d) If both assertion and reason are false.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that "Archaebacteria are more similar to eukaryotes rather than eubacteria."
- **Explanation**: Archaebacteria (or Archaea) are a group of single-celled organisms that have distinct genetic and biochemical characteristics. They are known to thrive in extreme environments, such as high temperatures, salinity, and acidity.

### Step 2: Understand the Reason
The reason states that "Archaean genome is more similar to eukaryotic genome rather than bacterial genome."
- **Explanation**: The genetic material (genome) of Archaea shares more similarities with that of eukaryotes than with eubacteria. This includes aspects like the structure of DNA, the presence of introns, and the mechanisms of transcription and translation.

### Step 3: Compare Archaebacteria, Eubacteria, and Eukaryotes
- **Genetic Similarities**: Archaebacteria have similarities in their rRNA sequences and certain metabolic pathways with eukaryotes, which are not found in eubacteria.
- **Cellular Structure**: The cell membrane composition of Archaebacteria is different from that of eubacteria and resembles that of eukaryotes.

### Step 4: Conclusion
Both the assertion and the reason are correct. The assertion is supported by the reason provided. Therefore, we can conclude that:
- **Assertion**: True
- **Reason**: True
- **Explanation**: The reason explains the assertion.

### Final Answer
Both the assertion and reason are correct, and the reason explains the assertion.

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