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EcoRI cuts the DNA between bases

Options

  1. AG and C
  2. BG and A
  3. CA and T
  4. DC and A

Correct answer

B. G and A

Step-by-step solution

Each restriction endonuclease functions by ‘inspecting’ the length of a DNA sequence. Once it finds its specific recognition sequence, it will bind to the DNA and cut each of the two strands of the double helix at specific points in their sugar -phosphate backbones. Each restriction endonuclease recognises a specific palindromic nucleotide sequences in the DNA. EcoRI cuts the DNA between bases G and A only when the sequence GAATTC is present in the DNA

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