Advertisements
Advertisements
प्रश्न
Describe three steps involved in mechanism of PCR.
Advertisements
उत्तर
At the start of PCR, all the requirements are mixed together in 'eppendorf tube' and the following operations are performed sequentially:
- Denaturation: The reaction mixture is heated to a temperature (90–98° C) to separate two strands of desired DNA. This is called denaturation.
- Annealing: The mixture is allowed to cool (40–60° C) that permits pairing of the primer to the complementary sequences in DNA. This step is called annealing.
- Primer extension/Polymerization: The temperature (70–75° C) allows thermostable Taq DNA polymerase to use single-stranded DNA as template and adds nucleotides. This is called primer extension. It takes around two minutes duration.
APPEARS IN
संबंधित प्रश्न
Ti plasmid being used for introducing genes in plants obtained from ______.
Which of the following is TRUE regarding EcoR I?
Consider there is only one double stranded DNA molecule initially along with all other requirements of PCR. If a PCR machines performs 10 cycles of reaction then bow many double stranded DNA molecules would be present at the end?
Which of the following is the right combination of primers in a PCR to amplify the DNA product?
Which molecules are called molecular scissors? Why are they called so?
The transfer of genetic material from one bacterium to another through the mediation of a viral vector is termed as ______.
Both a wine maker and a molecular biologist who had developed a recombinant vaccine claim to be biotechnologists. Who in your opinion is correct?
Plasmid is ______.
The restriction enzymes used as molecular scissors are type of ______.
The three basic steps in genetic modification are:
