At a time, when the symptoms of the disease are not yet visible, very low concentration of a bacteria of virus can be detected by PCR. 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 molecular biology technique used to amplify specific DNA sequences. This means that it can take a very small amount of DNA and make millions of copies of it.

2. **Application of PCR**: PCR is particularly useful in situations where the target DNA is present in very low concentrations, such as during the early stages of an infection when symptoms are not yet visible. This allows for the detection of pathogens (like bacteria or viruses) even when they are not easily detectable by other means.

3. **Identifying the Purpose of PCR**: The main purpose of PCR is to amplify DNA. This amplification allows researchers and clinicians to analyze the genetic material more easily and accurately.

4. **Evaluating the Options**: The options provided are:
- DNA Identification
- DNA Repair
- DNA Amplification
- Cleaving of DNA

Among these options, the primary function of PCR is best described as "DNA Amplification."

5. **Conclusion**: Therefore, the correct answer to the question regarding the use of Polymerase Chain Reaction technology is "DNA Amplification."

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