Choose the correct pair from the following [NEET-2020]

(A)Polymerases - Break the DNA into fragments
(B)Nucleases - Separate the two strands of DNA
(C)Exonucleases - Make cuts at specific positions within DNA
(D)Ligases - Join the two DNA molecules

The NCERT line that answers it

Verbatim line

The linking of antibiotic resistance gene with the plasmid vector became possible with the enzyme DNA ligase, which acts on cut DNA molecules and joins their ends.

Chapter: Biotechnology: Principles and Processes
Section: 9.1 PRINCIPLES OF BIOTECHNOLOGY
Page: 4
Words matched: 27 of 27

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

6667, emb=0.6909, combined=0.6812). Verified: high — The span explicitly states 'DNA ligase... joins their ends,' which directly matches the fact that ligases join DNA molecules, distinguishing it from the incorrect options.

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Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

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Question text is reproduced from the published NEET 2020 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.