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Question 13 of 20 :
Select the best answer for the question
13. What molecular cloning tool do bacteria naturally produce to defend against viral infections?
O A. DNA ligase
O B. Restriction enzymes
O C. Antibiotics
O D. PCR
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Answer:

O B. Restriction enzymes

Explanation:

Restriction enzymes has the ability to recognize specific DNA sequences and cut them in a specific manner in order to produced by the bacteria as a defense mechanism against foreign DNA containing substance such as viruses etc. This restriction enzyme is also called restriction endonucleases. This is a cloning tool that bacteria produced naturally in order to defend itself from the infection of virus.

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