Option (1) is the correct answer because separated DNA fragments can be visualised only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation. We cannot see pure DNA fragments in visible light and without staining. ⇒ The DNA fragments separate (resolve) according to their size through sieving effect provided by agarose gel. ⇒ DNA is a negatively charged molecule, hence it moves towards the positive electrode (anode).
Identify the incorrect statement related to gel electrophoresis.
NEET UG 2024 — Zoology Biotechnology - Principles and Processes
2024mcqmedium
Identify the incorrect statement related to gel electrophoresis.
Official previous-year question
Held on 30 Apr 2024 · Verified 9 Jul 2026.
Options
- A
Separated DNA fragments can be directly seen under UV radiation
- B
Separated DNA can be extracted from gel piece
- C
Fragment of DNA moves toward anode
- D
Sieving effect of agarose gel helps in separation of DNA fragments
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