Restriction endonuclease cut strands of double helix DNA at a. hydrogen bonding in the base pairs b. glycosidic bond between nitrogen bases and sugar c. specific point in their sugar-phosphate backbones d. random area in the base pairs
Option C. The restriction endonuclease enzyme inspects the length of a DNA sequence. Once it recognises specific sequence, it binds to the DNA and cuts each of the two strands of the double helix at specific points in their sugar phosphate back bone. Special sequence in the DNA recognised by restriction endonuclease is called palindromic nucleotide sequence. Restriction endonuclease enzymes are also known as molecular scissors or biological scissors or chemical knives or chemical scalpels. So, the correct answer is 'Sugar and phosphate components of a nucleic acid molecule'.
