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प्रश्न
Explain with the help of a suitable example the naming of a restriction endonuclease.
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उत्तर
The naming of a restriction endonuclease is done in the following way:
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Ist letter represents the genus of the organism from which the enzyme is derived.
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IInd and IIIrd letters represent the species of the organism.
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IVth letter represents the name of the strain.
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Roman number represents order of isolation.
For example, In EcoRI − Derived from E.coli, strain R.
It is the Ist to be discovered.
संबंधित प्रश्न
Make a chart (with diagrammatic representation) showing a restriction enzyme, the substrate DNA on which it acts, the site at which it cuts DNA and the product it produces.
Answer the following question.
Explain the significance of palindromic nucleotide sequence in the formation of recombinant DNA.
The total number of nucleotide sequences of DNA that code for a hormone is 1530. The proportion of different bases in the sequence is found to be Adenine = 34%, Guanine = 19%, Cytosine = 23%, Thymine = 19%.
Applying Chargaff’s rule, what conclusion can be drawn?
There is a restriction endonudease called as EcoRI. What does co part in it stands for?
DNA fragments separate according to size through?
In agarose gel electrophoresis, DNA molecules are separated on the basis of their ______.
While isolating DNA from bacteria, which of the following enzymes is not required?
A plasmid DNA and a linear DNA (both are of the same size) have one site for a restriction endonuclease. When cut and separated on agarose gel electrophoresis, plasmid shows one DNA band while linear DNA shows two fragments. Explain.
How does one visualise DNA on an agarose gel?
Given below is the stepwise schematic representation of the process of electrophoresis. Identify the 'alphabets' representing
- Anode end
- smallest/lightest DNA strand in the matrix
- Agarose gel

