Multiple Choice
In a standard DNA extraction protocol, why is detergent (e.g., SDS) added to the sample?
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18. Molecular Genetic Tools
Methods for Analyzing DNA
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In agarose gel electrophoresis, why is bromophenol blue added to individual DNA samples before loading them into the gel?
A
It intercalates into DNA to increase fluorescence under UV light so bands can be seen without staining.
B
It digests contaminating proteins in the sample to prevent smearing in the gel.
C
It chemically denatures double-stranded DNA into single strands to improve separation by size.
D
It serves as a tracking dye to monitor sample migration during electrophoresis and helps visualize loading progress.
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