Q. Restriction endonucleases are enzymes which
A) Make cuts at specific positions within the DNA molecule
B) Recognize a specific nucleotide sequence for binding of DNA ligase
C) Restrict the action of the enzyme DNA polymerase
D) Remove nucleotides from the ends of the DNA molecule
Explanation
Restriction endonuclease recognizes a specific DNA base sequence (recognition sequence, recognizion site, restriction sequence or restriction site having palindromic sequence) and cleaves both the strands of DNA at or near that site. The enzyme cuts the DNA, generating restriction fragments with overhanging ends or blunt ends.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.