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Moderate

Action of Endonucleases

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The restriction enzyme, Eco RI, recognizes and cuts the sequence below.

Based on the cut pattern, what types of bonds are cleaved by the action of the enzyme?

Dersken, Bryan. "File:EcoRI Restriction Enzyme Recognition Site.svg." Wikimedia Commons. Wikipedia, n.d. Web. 25 Feb. 2016.

A

Covalent bonds between the sugar and nitrogenous base.

B

Covalent bonds within the nitrogenous base.

C

Covalent bonds between the sugar and phosphate groups.

D

Hydrogen bonds between the sugar and phosphate.