Enzymes used in breaking DNA at specific sites are

DNA-ases

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Endonucleases

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Restriction endonucleases

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Exonucleases

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Solution

The correct option is C Restriction endonucleases
Restriction enzymes are used in genetic engineering for gene manipulation. It cuts DNA base pairs at specific sites. They cut the base pairs within the molecule so they are named as an endonuclease. 3000 restriction enzyme has been discovered till now. They are known as molecular scissors as they are used to cut a single gene from a larger piece of DNA. The restriction enzyme Eco RI, Bam II and Hind Ill are used in recombinant DNA technology to produce cuts in vector and other DNA molecules to obtain chimeric DNA.
So, the correct answer is option C.

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Similar questions

Q. Restriction enzymes cut DNA at specific sites known as ______________.

Restriction enzymes present in several micro-organisms cut foreign DNA at specific sites and destroy them. These enzymes do not destroy cellular DNA because______

Q. The enzyme capable of cutting DNA molecule at specific sites is

Q. Short /Long answer type questions.
Name the category of enzymes that cut at a specific site within the DNA molecule. Give an example. Explain how do these enzymes functions. Mention their use in genetic engineering.

Q. Read the following statements and choose the appropriate option.
Statement 1 - The enzyme catalysing the removal of nucleotides from the ends of DNA is exonuclease.
Statement 2 - The enzyme that cleaves phosphodiester bonds at any site within the DNA is exonuclease.
Statement 3 - The enzyme that cleaves phosphodiester bonds at specific sites within the DNA is endonuclease.

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