🔬 Biology · Biotechnology: Principles and Processes · NEET

During gel electrophoresis the separated DNA bands cannot be seen directly. They are visualised by staining with a dye and then exposing the gel to:

Answer: UV radiation.

A Infrared light
B UV radiation
C X-rays
D Visible white light only

Correct answer: B. UV radiation

Explanation: DNA separated on an agarose gel is stained with ethidium bromide and exposed to UV radiation, under which the DNA bands appear as bright orange bands.

Recombinant DNA technology: a gene of interest and plasmid are cut by the same restriction enzyme, ligated into a recombinant plasmid, and introduced into a host cell.

Concept context

Recombinant DNA, GMOs, PCR, CRISPR, and biotechnology applications. Growing importance in NEET.

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During gel electrophoresis the separated DNA bands cannot be seen directly. They are visualised by staining with a dye and then exposing the gel to:

Concept context

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