To prevent evaporation of PCR products.
The enzyme DNA polymerase ( Taq polymerase) used in the PCR requires Mg 2+ ions for its functioning.These Ions act as cofactors for the enzyme . Hence the requirement for the use of Mg Cl2 in PCR reactions.
The purpose of the buffer in PCR, I assume you talking about the 5 or 10 times PCR buffer that is provided with enzyme. Buffer is needed to give the correct pH and pottasium ion concentration for the DNA polymerase enzyme (usually DNA polymerase from Thermus aquaticus) to function.
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
A PCR machine also known as a thermal cycler is a machine used to amplify segments of dna via the PCR which stands for polymerase chain reaction. PCR machines may also be used to test temperature sensitive reactions. The first step of the machine is to heat the samples to 94-96 degrees, then the temperature is lowered to 50-65 degrees, then the mixtures temperature is raised to 72 degrees to synthesize a new dna strand.
The purpose of a multiplex polymerase chain reaction is to rapidly detect duplication's in a large gene, or to find deletions in a large gene. There are also many other uses for the multiplex PCR as well.
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.
types of pcr: AFLP -PCR. Allele-specific PCR. Alu-PCR. Assembly -PCR. Assemetric -PCR. Colony -PCR. Helicase dependent amplification. Hot start pCR. Inverse -PCR. Insitu -pCR. ISSR-PCR. RT-PCR(REVERSE TARNSCRIPTASE). REAL TIME -PCR
Difference between real time PCR and reverse transcription PCR is as follows:- 1. Real time PCR is donated as qPCR and on the other hand reverse transcription PCR is denoted as RT-PCR. 2. In qPCR, the template used is single strand DNA strand whereas in the RT-PCR, the template used in process is single strand of RNA. 3. The real time PCR enables both quantification as well as detection of the DNA in the real time whereas the RT-PCR enables only the quantification of the RNA and it is little bit slower process then the qPCR as it first produce the cDNA from the template RNA strand and then process it in the similar fashion as the traditional PCR.
mgcl2 acts as a cofactor for the DNA polymerase used and is necessary for efficient functioning of the pcr
PCR
pcr