Which of the Following Correctly Describes a Strategy That Bacteria

question 43

Multiple Choice

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.

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