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PCR
Polymerase chain reaction is used in molecular biology to amplify copies of dna. It is used in dna cloning for sequencing, functional analysis of genes, identification of genetic finger prints, diagnosis of hereditary diseases & infectious diseases.
Dr. Alan Ali reviewed this
34 year experience in Psychiatry
How long it usually lasts:
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Related questions
A 48-year old asked:
What is pcr?
1 doctor answer • 4 doctors weighed in
A 21-year old asked:
What is a PCR test?
2 doctor answers • 3 doctors weighed in
A 18-year old female asked:
What is the difference between PCR testing and Rapid testing?
1 doctor answer • 1 doctor weighed in
A 37-year old female asked:
Can you do pcr swab culture when having maximum symptoms but no lesions?
1 doctor answer • 1 doctor weighed in
A 28-year old male asked:
Is PCR should be repeated if it gave negative result after exposure by one month, if yes after how much time shd be repeated ?
1 doctor answer • 1 doctor weighed in
A 44-year old asked:
How is PCR used in diagnosing cancers?
2 doctor answers • 5 doctors weighed in
A 38-year old asked:
What exactly a polymerase chain reaction is or a "pcr test?
1 doctor answer • 2 doctors weighed in
A 34-year old asked:
How many types of pcr(polymerase chain reaction) is available?
2 doctor answers • 3 doctors weighed in
A 28-year old male asked:
What is the definition or description of: influenza on rt PCR test?
2 doctor answers • 4 doctors weighed in
A 48-year old asked:
By explaining what exactly a polymerase chain reaction is or a "pcr test?
1 doctor answer • 2 doctors weighed in
A 59-year old female asked:
I did a PCR on 15 December. Am in Mozambique on visit. Is that test still valid for entering within 14 days?
1 doctor answer • 4 doctors weighed in
A 42-year old female asked:
Good morning My husband Frank is travelling to USA on the 13 January now he must do PCR test Can you please help ?
1 doctor answer • 1 doctor weighed in
A 38-year old male asked:
Good day .After testing positive for Covid-19 PCR test how long can you wait before taking another test needed for travel purposes?
2 doctor answers • 3 doctors weighed in
A 61-year old male asked:
Is the covid Rapid test ""trustworthy?"" I have heard that the PCR is the best one, the correct one, but is the Rapid test ""ok?""/""acceptable?""
2 doctor answers • 3 doctors weighed in
A 23-year old female asked:
I had taken 2 covid-19 PCR tests in the same day and one of them came back negative and the other came back positive. I also had a negative rapid. Which do I believe?
2 doctor answers • 2 doctors weighed in
A 26-year old male asked:
I'm fully vaccinated (sinovac), I tested positive in rt pcr test then after 10days I tested negative in rt pcr then after a week tested positive again in rt pcr. Is this normal? Any suggestions what to do?
1 doctor answer • 1 doctor weighed in
A 37-year old female asked:
Husband isolated in room and got tested on day 2 of symptoms (positive) I had no definitive symptoms was tested on day 5/6 after his symptoms started. PCR. I was neg. how did I not catch Covid? Scared it actually was in my system?
2 doctor answers • 2 doctors weighed in
A 17-year old female asked:
Yesterday i tested positive for covid-19 on a rapid test. Today i went to get a PCR test and ended up testing negative on it. After testing negative on the PCR, i performed another rapid test and it came back positive. What does this mean?
1 doctor answer • 1 doctor weighed in
A 29-year old asked:
What are the steps for HIV testing using a pcr?
1 doctor answer • 2 doctors weighed in
A 30-year old male asked:
Is a urine PCR test reliable for detecting Herpes?
1 doctor answer • 3 doctors weighed in
A 38-year old asked:
What's the accuracy of PCR for HIV after one month of exposure?
1 doctor answer • 3 doctors weighed in
A 38-year old asked:
How long after exposure to HCV does it take to test + with pcr?
2 doctor answers • 5 doctors weighed in
A 33-year old asked:
Are a lot of tests using PCR to find viruses and other germs now?
2 doctor answers • 3 doctors weighed in
A 36-year old asked:
Is there any possibility to have pcr(-) test results but still have hiv?
1 doctor answer • 3 doctors weighed in
A 24-year old male asked:
Would a negative RNA PCR and Combo test at 6 weeks post PEP be conclusive?
1 doctor answer • 2 doctors weighed in
A member asked:
If PCR is positve and culture negative how do we go about it in tuberculosis?
3 doctor answers • 5 doctors weighed in
A 28-year old male asked:
I took a 4th gen and RNA PCR 19 days post pep. Both came out negative. How accurate is it ? Can I relax ?
1 doctor answer • 1 doctor weighed in
A 24-year old male asked:
How accurate can be the results of an HIV PCR test if it was taken 10 and 20 hours after possible exposure?
1 doctor answer • 2 doctors weighed in
A 48-year old asked:
What do you suggest if my reverse primer for my PCR forms a hairpin structure. is there any way to overcome this?
1 doctor answer • 3 doctors weighed in
A 48-year old male asked:
Hello, I have done a Pcr Hiv Test after 11,5 days which comes back negative. How conclusive is this test? Thks in advance?
1 doctor answer • 1 doctor weighed in
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