The PCR or Polymerase Chain Reaction is a laboratory system for DNA replication and amplificiation. It allows selected stretches of DNA to be duplicated using heat in the process.
The PCR reaction can be used to amplify DNA from all three sources mentioned. PCR relies on the use of short stretches of DNA that are 6 - 12 bases long to attach to the target DNA (the source where the DNA is coming from) so that the polymerase enzyme can make copies of the target DNA. As long as these primers are available (they can be commercially purchased in many cases), PCR can be carries out on fetal cell DNA and viral DNA. Fossil DNA however, may have undergone degradation. DNA has to be of a certain purity for PCR to work. If the fossil DNA had degraded or broken down, PCR cannot be carried out.
PCR is a biotechnological method to amplify your gene (DNA) of your interest. It produce millions of your DNA fragments hence used in cloning. There are variants of this method using the same thermocycling principle such as touch down PCR, gradient PCR, RFLP, multiplex PCR, Q PCR, RT PCR and so on.
PCR
What do you really want to ask? template DNA is a DNA you want to amplify. So you should know what you are amplifying before a PCR or you can make it by sequencing your PCR product.
polymerase chain reaction (PCR)
Restriction enzymes are not typically used in PCR. PCR relies on DNA polymerase to amplify specific DNA sequences, while restriction enzymes are used to cut DNA at specific recognition sites for other applications, such as cloning.
PCR stands for Polymerase Chain Reaction, a method used to amplify and copy small segments of DNA.
One common method is gel electrophoresis, where DNA samples are placed in a gel matrix and subjected to an electric field. The shorter DNA segments move faster through the gel, resulting in separation based on size. Another method is polymerase chain reaction (PCR), which uses specific primers to selectively amplify DNA segments of interest.
Quantitative PCR Technology is used in biochemistry, in particular molecular biology. The PCR stands for polymerase chain reaction and is used to "amplify" pieces of DNA to make millions of copies of a particular DNA strand.
The function of PCR in molecular biology is to amplify a specific segment of DNA, making multiple copies of it for further analysis and study.
The PCR machine is called a thermocycler. It is used to automate the polymerase chain reaction (PCR) process, which repeatedly heats and cools the sample to amplify specific DNA sequences.
PCR or polymerase chain reaction is a method to amplify a fragment of DNA. PCR reaction contains template DNA, primers, dNTPs, polymerase enzyme, buffer and water. The thermocycler manage the heat and time to synthesize DNA (denaturation, annealing and extension). The main application is one can amplify the gene or DNA of interest to millions of copies by using this prior to cloning.