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Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion: A piece of DNA inserted into an alien organism generally does not replicate if not inserted into a chromosome.
Reason: Chromosomes have specific sequences called 'ori' region where DNA replication is initiated.
  • a)
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • b)
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  • c)
    If Assertion is true but Reason is false.
  • d)
    If both Assertion and Reason are false.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Directions: In the following questions, a statement of assertion is fo...
Origin of replication' is a sequence from where replication starts by binding of polymerase enzyme. An isolated piece of DNA without origin of replication or 'ori' site cannot replicate and is gradually lost during nuclear divisions. But if it is inserted within a chromosome, it is replicated along with the chromosome as a result of the replication process initiated by the ‘origin of replication’ site of the chromosome. This is the reason why recombinant vectors used in genetic engineering must contain origin of replication so that they can replicate themselves during cell division in order to ensure presence of recombinant gene in all the progeny.
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Directions: In the following questions, a statement of assertion is fo...
Understanding the Assertion
The assertion states that a piece of DNA inserted into an alien organism does not replicate unless it is integrated into a chromosome. This is fundamentally true because:
- The replication of DNA requires specific sequences and structures.
- Free-floating DNA in the cell lacks the necessary elements for replication.
Explaining the Reason
The reason provided is that chromosomes contain specific sequences known as the ori region (origin of replication). This is also true because:
- The ori region is where DNA replication is initiated.
- Chromosomes provide the necessary machinery and context for DNA replication processes.
Connection Between Assertion and Reason
Both the assertion and the reason are true.
- The assertion highlights the necessity of chromosomal integration for DNA replication.
- The reason explains why chromosomes are essential: they contain the ori regions vital for initiating replication.
However, the reason directly supports the assertion by explaining the mechanism behind it. Thus, the reason serves as a correct explanation for the assertion.
Conclusion
Since both the assertion and the reason are true, and the reason correctly explains the assertion, the correct choice is:
- Option A: If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
This understanding is crucial in molecular biology, especially when studying gene cloning and manipulation in genetic engineering.
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Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: A piece of DNA inserted into an alien organism generally does not replicate if not inserted into a chromosome.Reason: Chromosomes have specific sequences called ori region where DNA replication is initiated.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertion.b)If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.c)If Assertion is true but Reason is false.d)If both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: A piece of DNA inserted into an alien organism generally does not replicate if not inserted into a chromosome.Reason: Chromosomes have specific sequences called ori region where DNA replication is initiated.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertion.b)If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.c)If Assertion is true but Reason is false.d)If both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: A piece of DNA inserted into an alien organism generally does not replicate if not inserted into a chromosome.Reason: Chromosomes have specific sequences called ori region where DNA replication is initiated.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertion.b)If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.c)If Assertion is true but Reason is false.d)If both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: A piece of DNA inserted into an alien organism generally does not replicate if not inserted into a chromosome.Reason: Chromosomes have specific sequences called ori region where DNA replication is initiated.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertion.b)If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.c)If Assertion is true but Reason is false.d)If both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
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