NEET 2022 · Class 12

Biotechnology: Principles and Processes

In the following palindromic base sequences of DNA, which one can be cut easily by particular restriction enzyme? [NEET-2022]

  1. (A)5'GATACT3'; 3'CTATGA5'
  2. (B)5'GAATTC3'; 3'CTTAAG5'
  3. (C)5'CTCAGT3'; 3'GAGTCA5'
  4. (D)5'GTATTC3'; 3'CATAAG5'

The NCERT line that answers it

Verbatim line

EcoRI cuts the DNA between bases G and A only when the sequence GAATTC is present in the DNA

Chapter
Biotechnology: Principles and Processes
Section
9.2 Tools of Recombinant DNA Technology

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 that EcoRI cuts DNA between bases G and A only when the sequence GAATTC is present, which directly matches option B and distinguishes it from the other palindromic sequences.

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