Question

Choose the correct answer from the alternatives given.
A restriction enzyme breaks bonds between the

• A. base pairs of a DNA molecule
• B. sugar and phosphate components of a nucleic acid molecule
• C. base pairs of a DNA-RNA hybrid molecule.
• D. exons and introns of a DNA molecule

Answer 1

The correct option is B sugar and phosphate components of a nucleic acid molecule

Restriction enzymes are the enzymes that have the capability to cleave the phosphodiester bonds between the sugar molecule and the phosphate molecule. It has a property of cleaving DNA molecules at or near a specific sequence of bases. This is produced by certain strains of bacteria. Each restriction enzyme cleaves around a specific DNA sequence. Example: EcoR1 splices around sequence GAATTC, BamH1 cleaves around GGATCC, etc.

So, the correct option is 'sugar and phosphate components of a nucleic acid molecule'.