The polymerase chain reaction (PCR) is a technique used for what?

Amplification of DNA.

The correct answer is  option1 .Amplification of DNA.

Polymerase Chain Reaction (PCR) is a widely used molecular biology technique that enables the selective amplification of a specific segment of DNA. Developed by Kary Mullis in 1983, PCR has become an essential tool in various fields, including genetics, genomics, forensics, and medical diagnostics.

The PCR process involves three main steps:

1. Denaturation

2. Annealing

3. Extension:

The polymerase chain reaction (PCR) is a laboratory technique used for the amplification of DNA. It allows the selective and targeted amplification of a specific DNA segment, creating multiple copies of the DNA region of interest. PCR is widely used in various molecular biology applications, including DNA sequencing, genetic analysis, and diagnostics. It is not used for the amplification of enzymes or proteins.