Class NEET 2026 ALL Q #2074
KNOWLEDGE BASED
APPLY
4 Marks 2026 NTA-RE-NEET-2026 MCQ SINGLE
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:
(A) Statement I is incorrect but Statement II is correct
(B) Both Statement I and Statement II are correct
(C) Both Statement I and Statement II are incorrect
(D) Statement I is correct but Statement II is incorrect
Prev Next
Correct Answer: B

AI Tutor Explanation

Powered by Gemini

Detailed Solution

Step 1: Analyze Statement I

Plasmids are small, circular, double-stranded DNA molecules that are distinct from a cell's chromosomal DNA. They possess their own origin of replication, which allows them to replicate independently of the chromosomal DNA within the host cell. Therefore, Statement I is correct.

Step 2: Analyze Statement II

By definition, plasmids are extrachromosomal genetic elements. They exist outside the main bacterial chromosome and are not essential for the basic survival of the organism under normal conditions, though they often carry genes that provide advantages like antibiotic resistance. Therefore, Statement II is correct.

Step 3: Conclusion

Since both Statement I and Statement II are scientifically accurate descriptions of plasmids, the correct option is (B).

Final Answer: Both Statement I and Statement II are correct

AI generated content. Review strictly for academic accuracy.

Pedagogical Audit
Bloom's Analysis: This is an APPLY question because the student must apply their conceptual understanding of prokaryotic genetics to validate specific biological definitions.
Knowledge Dimension: CONCEPTUAL
Justification: The question tests the fundamental definition and biological properties of plasmids, which are core concepts in Biotechnology and Molecular Biology.
Syllabus Audit: In the context of NEET, this is classified as KNOWLEDGE (Textbook). This question directly assesses the NCERT-based understanding of Biotechnology: Principles and Processes.

More from this Chapter

MCQ_SINGLE
A particle of mass M moves along a horizontal x axis from $x=0$ to $x=L$. The coefficient of kinetic friction varies as a function of x as $\mu_{k}(x)=\mu_{0}-\alpha x,$ where $\mu_0$, $\alpha$ are constants of appropriate dimensions, so that $\mu_{k}(L)=0$. The total work done by the frictional force during the motion is $n\mu_0 MgL$, where g is the acceleration due to gravity. The value of n is:
MCQ_SINGLE
Three identical p-n junction diodes $D_{1}$, $D_{2}$ and $D_{3}$ are connected across a battery as shown in the figure. If the width of the depletion regions of $D_{1},$ $D_{2}$ and $D_{3}$ are $W_{1},$ $W_{2}$ and $W_{3}$, respectively, then the correct option is: [Image Placeholder]
MCQ_SINGLE
Genus represents
MCQ_SINGLE
The amino acid that gives a red-blood colour on treating its sodium fusion extract with sodium nitroprusside is
MCQ_SINGLE
How many theca are present in each lobe of a typical bilobed angiosperm anther?
View All Questions