NEET UG 2025 · Zoology · Question 179
NEET 2025 Zoology, question 179
Question 179 of the NEET 2025 paper (code 45) is a Zoology question from Biotechnology: Principles and Processes. Its idea, Blue-White Screening Outcomes, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 4.
Updated 2026-10-08
Q179 · Zoology
The blue and white selectable markers have been developed which differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce colour in the presence of a chromogenic substrate.
Given below are two statements about this method:
Statement I: The blue coloured colonies have DNA insert in the plasmid and they are identified as recombinant colonies.
Statement II: The colonies without blue colour have DNA insert in the plasmid and are identified as recombinant colonies.
In the light of the above statements, choose the most appropriate answer from the options given below:
- 1Both Statement I and Statement II are correct
- 2Both Statement I and Statement II are incorrect
- 3Statement I is correct but Statement II is incorrect
- 4Statement I is incorrect but Statement II is correctOfficial answer
Official answer: option 4 · NTA final answer key
Same idea
The only question on Blue-White Screening Outcomes
No other NEET paper from 2017–2026 tested this exact idea.
Blue-White Screening Outcomes: every question and how it was framed
The chapter
Biotechnology: Principles and Processes in ten years of NEET
46 questions from 2017–2026, asked in 10 of 10 papers, about 4.4 a paper. Cloning Vectors alone had 18.