Which of the following correctly describes a strategy that bacteria have evolved to defend against infection by phage?
A) The CRISPR-Cas system allows bacteria to recognize phage strains that have previously infected that bacterial lineage and targets the phage DNA for destruction.
B) Bacteria secrete enzymes that diffuse away from the cell and digest phage capsid proteins so the virus cannot infect the cells.
C) Bacteria methylate phage DNA as it enters the cell, targeting it for destruction by restriction enzymes.
D) The lysogenic cycle allows bacteria evolve inhibitors that bind with the phage DNA they contain so their daughter cells will no longer be infected.

Question

Quizplus · Accepted Answer

The CRISPR-Cas system is a bacterial immune mechanism that allows bacteria to "remember" and destroy DNA from specific phages that have previously infected them, providing a form of acquired immunity against those phages.

Which of the Following Correctly Describes a Strategy That Bacteria