Taq polymerase is isolated from:

The correct answer is Option (2) → Thermus aquaticus

Option (2) Thermus aquaticus — Correct. Taq polymerase is a thermostable enzyme from Thermus aquaticus.

Note: A similar question was also asked in CUET (UG) 2026 on 06-06-2026 (Slot 1), in CUET (UG) 2025 on 20-05-2025 (Slot 2), in CUET (UG) 2024 on 29-05-2024 (Slot 1), and in CUET (UG) 2023 on 22-06-2023 (Slot 3).

NCERT Extract:
Amplification of Gene of Interest Using PCR – “… If the process of replication of DNA is repeated many times, the segment of DNA can be amplified to approximately billion times, i.e., 1 billion copies are made. Such repeated amplification is achieved by the use of a thermostable DNA polymerase (isolated from a bacterium, Thermus aquaticus), which remain active during the high temperature induced denaturation of double stranded DNA.”