All the following are the properties of the enzyme taq polymerase except:

Options

A. It is thermostable DNA polymerase
B. It is isolated from a bacterium, Thermus aquaticus
C. It is used for the amplification of gene of interest using PCR
D. It is thermostable RNA polymerase

Answer

**Step-by-Step Solution:**

1. **Understanding Taq Polymerase**: Taq polymerase is an enzyme that is primarily used in the Polymerase Chain Reaction (PCR) to amplify DNA. It is derived from the bacterium Thermus aquaticus, which thrives in high-temperature environments.

2. **Properties of Taq Polymerase**:
- **Thermostability**: Taq polymerase is thermostable, meaning it can withstand high temperatures (up to about 95 degrees Celsius) without denaturing. This property is crucial for PCR, which involves repeated heating and cooling cycles.
- **DNA Polymerase Activity**: Taq polymerase functions as a DNA polymerase, synthesizing new strands of DNA complementary to the template strand during the PCR process.
- **Amplification of DNA**: Its primary role in PCR is to amplify a specific segment of DNA, producing millions of copies from a small initial sample.

3. **Identifying the Incorrect Statement**: The question asks for the property that is NOT associated with Taq polymerase. The options typically include statements about its properties, and one of them incorrectly states that Taq polymerase is an RNA polymerase.

4. **Conclusion**: Since Taq polymerase is a DNA polymerase and not an RNA polymerase, the statement claiming it to be an RNA polymerase is incorrect. Therefore, the answer to the question is that Taq polymerase is NOT an RNA polymerase.

5. **Final Answer**: The property that is NOT true about Taq polymerase is that it is a "thermostable RNA polymerase."

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