Which of the following statements are correct with respect …

Biology NEET Previous Year Question Paper NEET 2026 Previous Year Question Paper Single Correct MCQ

Published on: August 13, 2026

Which of the following statements are correct with respect to DNA separation, isolation and visualization?

The cutting of DNA is done by molecular scissors.
A and B only

The DNA fragments separate according to their size in an agarose gel, upon electrophoresis.
B and D only

The separated DNA fragments can be seen without staining when exposed to UV light.
A and D only

The separated DNA fragments, when stained with ethidium bromide, can be seen in visible light. Choose the correct answer from the options given below:
B and C only

Text Solution

Verified by Experts

The correct answer is:

Correct: Restriction endonucleases are called molecular scissors as they cut DNA.

Correct: Fragments separate by size in agarose gel; smaller ones move farther.

False: DNA is invisible to the naked eye/UV light without staining.

False: Stained DNA (with Ethidium bromide) must be exposed to UV light (not visible light) to appear as bright orange bands.

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