Polymerase chain reaction technology (PCR -technique) is used for

Options

A. DNA identification
B. DNA repair
C. DNA amplification
D. Cleave DNA

Answer

### Step-by-Step Solution:

1. **Understanding PCR**: The Polymerase Chain Reaction (PCR) is a laboratory technique used to amplify specific segments of DNA. This means it can create millions of copies of a particular DNA sequence from a small initial sample.

2. **Identifying the Purpose of PCR**: The main purpose of PCR is to increase the quantity of a specific DNA segment. This is essential for various applications in molecular biology, genetics, and forensic science.

3. **Analyzing the Options**:
- **Option A: DNA Identification**: While PCR can assist in DNA identification by providing enough DNA for analysis, its primary function is not identification.
- **Option B: DNA Repair**: PCR does not repair DNA; it is focused on amplification.
- **Option C: DNA Amplification**: This is the correct function of PCR, as it specifically increases the number of copies of a DNA segment.
- **Option D: Cleave DNA**: PCR does not cleave or cut DNA; it amplifies it.

4. **Conclusion**: Based on the analysis, the correct answer to the question "Polymerase chain reaction technology (PCR -technique) is used for" is **DNA amplification**.