Question
Biology Question on Enzymes
Which of the following statements is not correct for Restriction enzymes?
A
Exonucleases remove nucleotides from ends of the DNA.
B
Endonucleases make cuts at specific positions within the DNA.
C
Ligases join sticky ends of DNA together.
D
The first restriction endonuclease was Hind II.
Answer
The first restriction endonuclease was Hind II.
Explanation
Solution
The first discovered restriction enzyme was EcoRI, not Hind II. Exonucleases and endonucleases have different roles in DNA processing. Ligases join DNA fragments, especially during molecular cloning.