The enzyme employed for amplification of DNA during PCR is commercially obtained from:

Options

A. Trichoderma reesi
B. Thermus aquaticus
C. Bacillus licheniformis
D. Streptococcus pyogenes

Answer

To solve the question regarding the enzyme employed for amplification of DNA during PCR, we can follow these steps:

### Step 1: Identify the process
The question refers to the Polymerase Chain Reaction (PCR), which is a technique used to amplify DNA.

### Step 2: Determine the enzyme used in PCR
The key enzyme used in PCR for DNA amplification is known as DNA polymerase.

### Step 3: Specify the type of DNA polymerase
Among various DNA polymerases, the one specifically used in PCR is Taq polymerase.

### Step 4: Identify the source of Taq polymerase
Taq polymerase is derived from a thermophilic bacterium, which means it thrives at high temperatures.

### Step 5: Name the bacterium
The specific bacterium from which Taq polymerase is obtained is Thermus aquaticus.

### Conclusion
Thus, the enzyme employed for amplification of DNA during PCR is commercially obtained from Thermus aquaticus.

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