Write a note on recognition sequences or restriction sites.

Explanation

(1)Restriction endonucleases cut the DNA fragment at specific site.The site at which there is a cut is called recognition site or restriction site.(2)Restriction endonucleases have the ability to recognize DNA with specific 4 to 8 base pair sequences.RENs cleave these sequences.(3)Every restriction site is identified by a specific restriction endonuclease.(4)At the restriction site both the DNA strands are cut at the same time at these specific p[oints.(5)Most of the restriction stes have palindromic DNA and hence called palindromes.