NEET 2023 · Class 12

Biotechnology: Principles and Processes

Thermostable DNA polymerase used in PCR was isolated from : [NEET 2023 mpr]

  1. (A)Thermus aquaticus
  2. (B)Escherichia coli
  3. (C)Agrobacterium tumifaciens
  4. (D)Bacillus thuringiensis

The NCERT line that answers it

Verbatim line

Such repeated amplification is achieved by the use of a thermostable DNA polymerase (isolated from a bacterium, *Thermus aquaticus*), which remain active during the high temperature induced denaturation of double stranded DNA.

Chapter
Biotechnology: Principles and Processes
Section
9.3.3 Amplification of Gene of Interest using PCR
Page
12
Words matched
32 of 32

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

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'thermostable DNA polymerase (isolated from a bacterium, *Thermus aquaticus*)', which directly matches the question asking for the source of thermostable DNA polymerase used in PCR and distinguishes it from the other options.

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Question text is reproduced from the published NEET 2023 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.