NEET UG 2020 · Zoology · Question 18
NEET 2020 Zoology, question 18
Question 18 of the NEET 2020 paper (code E1) is a Zoology question from Biotechnology: Principles and Processes. Its idea, UV Visualization of DNA, was asked 3 times, in 2020, 2021 and 2023, across NEET 2017–2026. The NTA final answer key gives option 2.
Updated 2026-10-08
Q18 · Zoology
In gel electrophoresis, separated DNA fragments can be visualized with the help of :
- 1Acetocarmine in bright blue light
- 2Ethidium bromide in UV radiationOfficial answer
- 3Acetocarmine in UV radiation
- 4Ethidium bromide in infrared radiation
Official answer: option 2 · NTA final answer key
Same idea
UV Visualization of DNA, in other papers
NEET asked this idea 3 times, in 2020, 2021 and 2023. The other 2 questions below.
- 2023 Q107Upon exposure to UV radiation, DNA stained with ethidium bromide will showOne-line MCQ · Easy
- 2021 Q123DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as :One-line MCQ · Easy
UV Visualization of DNA: 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. Restriction Enzymes alone had 22.