NEET 2026 Zoology Restriction Enzymes MCQ Question
Which of the following statements are not true regarding restriction endonucleases?
A. They are called molecular scissors.
B. These are the enzymes responsible for restricting the growth of bacteriophages in
E. coli.
C. They cut the DNA only at the centre of the palindromic sites.
D. They remove nucleotides only from the ends of DNA fragments.
E. They recognise specific palindromic base-pair sequences. Choose the answer from the options given below :
A and B only
A and E only
D and E only
C and D only
Correct Answer
Detailed Explanation
Statements C and D are incorrect. Restriction endonucleases usually cut the DNA slightly away from the centre of palindromic sites. They cannot remove nucleotides from the ends of the DNA fragment, which is function of restriction exonuclease.
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