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प्रश्न
How does restriction endonuclease function?
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उत्तर
Each restriction endonuclease finds its specific palindromic nucleotide sequences in the DNA and cuts the DNA at these specific sites. It does so by binding to the DNA at these sites and cutting both the strands at specific points in their sugar-phosphate backbones.
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संबंधित प्रश्न
Explain with the help of a suitable example the naming of a restriction endonuclease.
Suggest a technique to a researcher who needs to separate fragments of DNA.
How does a restriction nuclease function? Explain
Name and describe the technique that helps in separating the DNA fragments formed by the use of restriction endonuclease
Which of the following enzymes catalyse the removal of nucleotides from the ends of DNA?
The role of DNA ligase in the construction of a recombinant DNA molecule is ______.
What does H in’ ‘d’ and ‘III’ refer to in the enzyme Hind III?
A mixture of fragmented DNA was electrophoresed in an agarose gel. After staining the gel with ethidium bromide, no DNA bands were observed. What could be the reason?
Carefully observe the given picture. A mixture of DNA with fragments ranging from 200 base pairs to 2500 base pairs was electrophoresed on agarose gel with the following arrangement.
(a) What result will be obtained on staining with ethidium bromide? Explain with reason.
(b) The above setup was modified and a band with 250 base pairs was obtained at X.
What change(s) were made to the previous design to obtain a band at X? Why did the band appear at position X?
'EcoRI' has played a very significant role in rDNA technology.
- Explain the convention for naming EcoRI.
- Write the recognition site and the cleavage sites of this restriction endonuclease.
