Correct option: (B)
Solution:
- Restriction endonucleases recognize specific sequences in the DNA to it into fragments.
- It is not to bind the DNA to ligase.
- Specific sites are 4-6 bp long and are called as restriction sites.
- Each restriction endonuclease has a specific restriction site.
- Exonucleases enzymes remove nucleotides one at a time from the end of a polynucleotide chain.
- They shorten the DNA by one nucleotide at a time, they do not digest it into fragments.