Question:
Given below are two statements:
Statement I: Plasmids are autonomously replicating DNA.
Statement II: Plasmids are extrachromosomal DNA.
In the light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements:
Statement I: Plasmids are autonomously replicating DNA.
Statement II: Plasmids are extrachromosomal DNA.
In the light of the above statements, choose the most appropriate answer from the options given below:
Statement I: Plasmids are autonomously replicating DNA.
Statement II: Plasmids are extrachromosomal DNA.
In the light of the above statements, choose the most appropriate answer from the options given below:
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Plasmids are widely used as vectors in recombinant DNA technology to deliver genes of interest into host bacteria.
Plasmids often carry selectable marker genes, such as those conferring resistance to antibiotics like ampicillin.
Updated On: Jun 22, 2026
- Statement I is incorrect but Statement II is correct
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Concept:
• Plasmids: Small, circular, double-stranded, extrachromosomal DNA molecules found naturally in bacterial cells and some fungi.
• They are physically separate from the host's chromosomal DNA.
• Plasmids possess an origin of replication (ori) sequence, enabling them to replicate independently (autonomously) of the host's genomic chromosome.
Step 1: Verify Statement I
Statement I is correct: Plasmids replicate autonomously because they have their own origin of replication.
Step 2: Verify Statement II
Statement II is correct: Plasmids are extrachromosomal, meaning they are located outside and separate from the host's main genome.
• Plasmids: Small, circular, double-stranded, extrachromosomal DNA molecules found naturally in bacterial cells and some fungi.
• They are physically separate from the host's chromosomal DNA.
• Plasmids possess an origin of replication (ori) sequence, enabling them to replicate independently (autonomously) of the host's genomic chromosome.
Step 1: Verify Statement I
Statement I is correct: Plasmids replicate autonomously because they have their own origin of replication.
Step 2: Verify Statement II
Statement II is correct: Plasmids are extrachromosomal, meaning they are located outside and separate from the host's main genome.
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