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What are exonucleases and endonucleases?...

What are exonucleases and endonucleases?

Text Solution

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(i) Exonucleases. They remove nucleotides from the ends of DNA,
(ii) Endonucleases. They make cuts at specific positions within DNA
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Explore conceptually related problems

Give one differene between enzymes exonucleases and endonucleases.

(a) Mention the difference in the mode of action of exonuclease and endonuclease. (b) How does restriction endonuclease function?

Knowledge Check

  • Assertion : Nucleases enzymes are of two kinds, exonucleases and endonucleases. Reason: Endonucleases remove nucleotides from the ends of the DNA

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false

  • Restriction endonucleases

    A
    Cleave DNA at hgihtly specific recoginition sequences
    B
    Are inserted into bacteria by bacteeriophages
    C
    Are made only by eukaryotic cells
    D
    Add methyl groups to specific DNA sequences

  • Restriction endonucleases

    A
    Are used for in utro DNA synthesis
    B
    Are synthesized by bacteria as part of defense mechanism
    C
    Are present in mammalian cells for degradation of DNA when the cells dies
    D
    Are used in genetic engineering

    • Similar Questions

    Explore conceptually related problems

    (a) Mention the difference in the mode of action of exonuclease and endonuclease. (b) How does restriction endonuclease function?

    (a) Differentiate between plasmid DNA and chromosomal DNA. (b) Differentiate between exonuclease and endonuclease.

    How is an exonuclease functionally different from an endonuclease and endonuclease an example of any two endonucleases other than Sal I.

    Discuss with your teacher and find out how to distinguish between (a) Plasmid DNA and Chromosomal DNA (b) RNA and DNA (c) Exonuclease and Endonuclease.

    Restriction endonucleases

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