Restriction endonucleases [en-duh-noo-klee-AY-sis] are found in bacteria and are thought to provide protection from viruses by cutting viral DNA into small fragments. Molecular biologists have used these enzymes to do which of the following?

W) Fight viral infections in eukaryotes [yoo-KAR-ee-ohts]

X) Clone specific genes into plasmids for expression by bacteria

Y) Restrict the production of telomeres in yeast

Z) Amplify desired DNA molecules in a controlled reaction
X) CLONE SPECIFIC GENES INTO PLASMIDS FOR EXPRESSION BY BACTERIA