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प्रश्न
How are 'sticky ends' formed on a DNA strand? Why are they so called?
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उत्तर
Sticky ends are produced by restriction enzymes. These enzymes cut the strand of DNA a little away from the centre of the palindrome sites but between the same two bases on the opposite strands. This leaves single stranded portions at the ends. There are overhanging stretches called 'sticky ends' on each strand.
These are called sticky ends because they form hydrogen bonds with their complementary cut counterparts. This stickiness of the ends facilitates the action of the enzyme DNA ligase.
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.
Write the use of restriction endonuclease in the formation of recombinant DNA.
Give a reason why :
Single cloning site is preferred in a vector.
There is a restriction endonudease called as EcoRI. What does co part in it stands for?
Molecular scissors, which cut DNA at specific site is ______.
Which of the following enzymes catalyse the removal of nucleotides from the ends of DNA?
Which of the given statements is correct in the context of visualizing DNA molecules separated by agarose gel electrophoresis?
Which of the following bacteria is not a source of restriction endonuclease?
How does one visualise DNA on an agarose gel?
State the importance of elution in this process.
