Multiple choice A restriction endonuclease breaks the bond between the ________. base pair of DNA molecules base pairs of a DNA-RNA hybrid sugar and phosphate components of nucleic acid molecule exons and introns of a DNA molecule Reveal answer Fill a bubble to check yourself C Correct answer Explanation A restriction endonuclease is an enzyme that cuts the DNA at or near a specific recognition nucleotide sequences known as restriction sites. It breaks the bond between the sugar and phosphate components of nucleic acid molecule.