Restriction Enzymes Have Proved So Useful in Manipulating DNA Because

Question

Restriction enzymes have proved so useful in manipulating DNA because
A)they cut at defined sites.
B)the sticky ends make it very easy to allow recombination of any type of DNA.
C)they protect eukaryotes against virus attack.
D)they cut RNA molecules.
E)they cut at defined sites AND the sticky ends make it very easy to allow recombination of any type of DNA.

Accepted Answer

Restriction enzymes are able to cut at defined sites, making it easier to manipulate specific regions of DNA. Additionally, many restriction enzymes create "sticky ends" when they make their cuts, which can easily recombine with other complementary sticky ends, allowing for the manipulation and insertion of DNA fragments. Therefore, both option A and B are correct. However, restriction enzymes do not protect eukaryotes against virus attack nor do they cut RNA molecules, so options C and D are incorrect.