In recombinant DNA technology, restriction endonucleases function by inspecting the length of a DNA sequence and making cuts at specific positions. Which of the following bonds is directly cleaved by the action of these enzymes?

Step-by-step solution

Restriction endonucleases are enzymes that recognize specific nucleotide sequences in DNA and make cuts at or near these sites. The primary action of these enzymes is to hydrolyze the sugar-phosphate backbone of the DNA molecule. This backbone is held together by phosphodiester bonds, which link the 3' carbon of one sugar molecule to the 5' carbon of the next. Therefore, restriction endonucleases directly cleave the phosphodiester bonds in the sugar-phosphate backbone of the DNA. Answer: Phosphodiester bonds in the