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NEET2022ZoologyBiotechnology - Principles and ProcessesActual

Given below are two statements: Statement I : Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence. Statement II : Restriction endonucleases cut the DNA strand a little away from the centre of the palindromic site. In the light of the above statements, choose the most appropriate answer from the options given below:

Options

  1. ABoth Statement I and Statement II are incorrect
  2. BStatement I is correct but Statement II is incorrect
  3. CStatement I is incorrect but Statement II is correct
  4. DBoth Statement I and Statement II are correct

Correct answer

D. Both Statement I and Statement II are correct

Step-by-step solution

Statement I : Restriction endonucleases do recognise unique sequences to cut the DNA. These sequences are arranged in the form of a palindrome. So, statement I is correct. Statement II : Restriction endonucleases cut the DNA strand a little away from the centre of the palindromic site. This helps generate sticky ends. So, statement II is correct. Option 4 is correct. Note: Statement II is correct as per NCERT but is not correct scientifically as a general statement for restriction endonucleases.

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