Biology NEET Previous Year Question Paper NEET 2024 Previous Year Question Paper - II Single Correct MCQ
Published on: August 13, 2026

Identify the incorrect statement related to gel electrophoresis.

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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The correct answer is:
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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).

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