Assertion: Mitochondria are considered as prokaryotic
endosymbiont of cell.
Reason:- Genetic system of mitochondria is similar to prokaryotes.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that "Mitochondria are considered as prokaryotic endosymbiont of cell." This is based on the endosymbiotic theory, which suggests that mitochondria originated from free-living prokaryotic organisms that were engulfed by ancestral eukaryotic cells.

2. **Evaluating the Reason**: The reason given is "Genetic system of mitochondria is similar to prokaryotes." This statement is accurate as mitochondria contain their own DNA, which is circular and similar to bacterial DNA. Additionally, mitochondria have their own ribosomes, which are similar to 70S ribosomes found in prokaryotes.

3. **Connecting Assertion and Reason**: Since both the assertion and reason are correct, we need to determine if the reason correctly explains the assertion. The similarity in the genetic system of mitochondria to prokaryotes supports the idea that mitochondria originated from prokaryotic cells, thus making the reason a valid explanation for the assertion.

4. **Choosing the Correct Option**: Given that both the assertion and reason are true, and the reason provides a correct explanation for the assertion, the correct answer is option A: "Both assertion and reason are true, and reason is the correct explanation of the assertion."

**Final Answer**: A. Both assertion and reason are true, and reason is the correct explanation of the assertion.

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