Restriction endonucleases cleave the _ of duplex DNA.
Correct answer: C. Phosphodiester bond
- A. Nitrogenous base
- B. Base sugar
- C. Phosphodiester bond
- D. Hydrogen bond
Explanation
The restriction endonucleases cuts the two strands of the double helix at specific point in the sugar phosphate backbone of DNA, it breaks phosphodiester bonds between the phosphate and the pentose sugar.
This question appeared on the UHS MDCAT 2016 paper, which you can sit online with every answer explained.
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