Question

bacteria protect themselves from viruses by fragmenting viral DNA upon the entry with
a] methylase
b] endonuclases
c] ligases
d] exonucleases

Answer 1

How do bacteria defend themselves against viruses? ... Just as humans are susceptible to viruses, bacteria have their own viruses to contend with. These viruses – known as phages – attach to the surface of bacterial cells, inject their genetic material, and use the cells' enzymes to multiply while destroying their hosts.