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MODEL PAPER 6 — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYMODEL PAPER 61 Mark
MCQ
Thermostable DNA polymerase is isolated from bacterium:
  • A
    Rhizobium
  • B
    Salmonella typhii
  • C
    Escherichia coli
  • D
    Thermus aquaticus
✓

Answer

Thermus aquaticus
Explanation: Taq polymerase is a thermostable DNA polymerase named after the thermophilic bacterium Thermus aquaticus from which it was originally isolated by Chien et al. in 1976. Its name is often abbreviated to Taq Pol or simply Taq. It is frequently used in the polymerase chain reaction (PCR), a method for greatly amplifying the quantity of short segments of DNA. It remains active during high temperature-induced denaturation of double-stranded DNA.

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