Where do restriction enzymes come from in nature and what is their biological function?

Answer 1

They are produced by some bacteria as a defense mechanism against viruses. They cut the DNA at specific site called the recognition sites. As humans, we extract these enzymes from bacteria that has been previously cultured them we use them in biotechnology.

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Answer 2

Ruby Armstrong

Restriction enzymes, also known as restriction endonucleases, are enzymes that originate from bacteria and archaea. Their biological function is to protect these organisms from foreign DNA, such as viral DNA or DNA from other organisms, by cutting it into smaller, non-functional fragments. This defense mechanism helps prevent infection by foreign genetic material and allows the organism to degrade and eliminate the invading DNA.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.