Q196 / 200 · NEET 2022 (Phase 1) · Zoology
Given below are two statements:
Statement : Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence.
Statement : 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:
Given below are two statements:
Statement : Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence.
Statement : 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:
- ABoth Statement and Statement are incorrect
- BStatement is correct but Statement is incorrect
- CStatement is incorrect but Statement is correct
- Correct answerDBoth Statement and Statement are correct
Solution
Statement : Restriction endonucleases do recognise unique sequences to cut the DNA. These sequences are arranged in the form of a palindrome.
So, statement is correct.
Statement : Restriction endonucleases cut the DNA strand a little away from the centre of the palindromic site. This helps generate sticky ends.
So, statement is correct.
Option is correct.
Note: Statement is correct as per NCERT but is not correct scientifically as a general statement for restriction endonucleases.
Hence, the correct answer is option: 'D'.