NEET 2012 · Class 12

Biotechnology: Principles and Processes

In genetic engineering, the antibiotics are used (Mains 2012)

  1. (A)as selectable markers
  2. (B)to select healthy vectors
  3. (C)as sequences from where replication starts
  4. (D)to keep the cultures free of infection

The NCERT line that answers it

Verbatim line

Since, due to ampicillin resistance gene, one is able to select a transformed cell in the presence of ampicillin.

Chapter
Biotechnology: Principles and Processes
Section
9.3.4 Insertion of Recombinant DNA into the Host Cell/Organism
Page
12
Words matched
31 of 31

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

How this line gives the answer

2, emb=1.0, combined=0.68). Verified: high — The span explicitly states that the ampicillin resistance gene enables selection of transformed cells in the presence of ampicillin, and directly identifies it as a 'selectable marker', which is the precise biological fact required to answer the MCQ.

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