Question

DNA polymerase is isolated from bacteria:

  • E. coli
  • Thermus aquaticus
  • Salmonella typhimurium
  • Thermus occus

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Answer

Question: DNA polymerase is isolated from which bacteria?

  • E. coli
  • Thermus aquaticus
  • Salmonella typhimurium
  • Thermus occus

Answer:

DNA polymerase used in polymerase chain reaction (PCR) is known as Taq polymerase. This enzyme is isolated from the thermophilic bacterium Thermus aquaticus.

  1. Taq polymerase can withstand high temperatures, which is essential for the denaturation step in PCR.
  2. It enables the amplification of the DNA or gene of interest during the PCR process.

Given the options:

  • E. coli: Incorrect
  • Thermus aquaticus: Correct
  • Salmonella typhimurium: Incorrect
  • Thermus occus: Incorrect

Therefore, the correct answer is Thermus aquaticus.


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