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.

Question

Quizplus · Accepted Answer

Restriction enzymes cut at defined sites and produce sticky ends, which can easily recombine with any type of DNA. This feature has made them very useful in manipulating DNA, especially in recombinant DNA technology. Therefore, both options A and B are correct, making E the best choice. Option C is not correct, as restriction enzymes are not involved in protecting eukaryotes against virus attack. Option D is also not correct, as restriction enzymes do not cut RNA molecules.

Restriction Enzymes Have Proved So Useful in Manipulating DNA Because