NEET UG 2021 · Botany · Question 123
NEET 2021 Botany, question 123
Question 123 of the NEET 2021 paper (code O1) is a Botany 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 4.
Updated 2026-10-08
Q123 · Botany
DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as :
- 1Dark red bands
- 2Bright blue bands
- 3Yellow bands
- 4Bright orange bandsOfficial answer
Official answer: option 4 · 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
- 2020 Q18In gel electrophoresis, separated DNA fragments can be visualized with the help of :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.