What exactly a polymerase chain reaction is or a "pcr test?

Nucleic acid testing. Pcr allows enormous expansion of a chosen, limited segment of dna and facilitate testing of nucelic acid abnormalties. Pcr by itself is not a test. The specificity of the test is detemined by the composition of the probes used to analyse the nucelic acids.

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By explaining what exactly a polymerase chain reaction is or a "pcr test?

DNA amplification. Poymerase chanin reaction/pcr is a process to amplify a specific stretch of dna. Pcr is a way to perform a number of tests by using specific probes. Pcr by itself is not a test, but one step in many tests. Read more...

I just had polymerase chain reaction (pcr) HIV test negative at 4 weeks 6 days, almost 5 weeks?

Probably free. There are rare cases in which antibody testing has remained negative for several months, but you probably do not have hiv. If you are in a state of anxiety over this and can afford it, a PCR for the presence of viral RNA in your blood will solve this definitively. Read more...

How many types of pcr (polymerase chain reaction) is available?

Probably one. In the rt-pcr test, viral RNA is extracted from the patient's plasma and treated with reverse transcriptase (rt) to convert the viral RNA into cdna. The polymerase chain reaction (pcr) process is then applied. This is then quantified. There is a quantiplex bdna or branched dna test, but it is done by centrifuge to concentrate and detect by a color reaction that can be quantified, not pcr. Read more...

How many types of pcr (polymerase chain reaction) available?

Probably one. In the rt-pcr test, viral RNA is extracted from the patient's plasma and treated with reverse transcriptase (rt) to convert the viral RNA into cdna. The polymerase chain reaction (pcr) process is then applied. This is then quantified. There is a quantiplex bdna or branched dna test, but it is done by centrifuge to concentrate and detect by a color reaction that can be quantified, not pcr. Read more...

How could PCR (polymerase chain reaction) be used to diagnose diseases?

Complicated issue. Pcr facilitates investigation of nucleic acid (dna and rna)abnromaltiies and some of the abnormalties are associated with specific diseases. Read more...

Cutaneous B cell lymphoma Polymerase Chain Reaction test came inconclusive. One red lesion on scalp 28 yr old. Are chances for skin lymphoma small?

Cutan BCL-PCR? JulietaS~ why was this test done? For 1 small red lesion on the scalp? And why was THAT disease specified?If this was done without specific need to exclude THAT specific diagnosis, it makes no sense whatsoever! Please go and see a Dermatologist for this to be sorted out but in general, doing these highly specific tests to exclude a diagnosis in a very non-specific way is irresponsible. Thanx. Read more...
There's a few tests. first, you'd look to see what cells are there. Obviously lymphoma cells and skin cells are not similar. Then you'd characterize the type of cell by a wide range of tools besides DNA. I truly don't know why DNA even matters here. Read more...

What is the definition or description of: polymerase chain reaction?

PCR. Polymerase chain reaction is a method of finding a specific piece of dna and copying it over and over again until there is enough to study. The technique allows a scientist to detect very small amounts of dna in a swab sample then reproduce enough of it to study it. It is very sensisitive for detecting the presence of certain bacteria and is also used in doing other dna tests (eg paternity). Read more...

What is the polymerase chain reaction and what is its purpose in medicine?

PCR. This is a landmark advance in DNA testing of various samples, allowing very small sample to be amplified to determine if specific segments of DNA code are present. It is used extensively now in routine microbiology, and in other settings as well in the clinical lab. Some oncology applications also exist. Read more...

What is polymerase chain reaction; how does it find little pieces of dna?

Maked little pieces. Polymerase chain reaction is a process for making copies of small segments of dna. The target segment is identified by probes that are complementary in structure to the native dna. The gap between the probe targets is filled in my the polymerase enzyme and the process is repeated multiple time with exponential increase in the number of fragments generated. Read more...