Bacteria protect themselves from viruses by fragmenting viral DNA with

By Rebecca
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Bacteria protect themselves from viruses by fragmenting viral DNA with

(a) Endonuclease

(b) Exonuclease

(c) Gyrase

(d) Ligase

Answer:

(a)Endonuclease

Explanation:

Restriction enzyme, also known as restriction endonuclease, is a bacterial protein that cleaves DNA at certain locations. Restriction enzymes cut foreign DNA in the bacterial cell, removing invading organisms. To defend itself against bacterial viruses known as bacteriophages, or phages, a bacterium uses a restriction enzyme. When a phage infects a bacterium, it inserts its DNA into the cell in order for it to be duplicated. By breaking the phage DNA into multiple pieces, the restriction enzyme stops replication. Restriction enzymes get their name from their capacity to limit the number of bacteriophage strains that can infect a bacteria.

‘Endonucleases’ is the right answer.

Bacteria protect themselves from viruses by fragmenting viral DNA with

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