Some uses of PCR amplification include:
ADiagnosis of infectious diseases (very sensitive detection of pathogen DNA)
BCloning genes of interest before ligation into vectors
CDNA fingerprinting from minute biological samples
DAll of the above
Answer & Solution
Correct answer: D. All of the above
**PCR is the most versatile technique in molecular biology**: pathogen diagnosis (HIV, COVID, TB), forensics (DNA fingerprinting from a single hair), prenatal genetic testing, gene cloning, sequencing prep, mutagenesis. NCERT explicitly mentions cloning use.
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