Multiple Choice
In gel electrophoresis, what is the purpose of a DNA ladder?
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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 a standard DNA extraction protocol, what is the primary purpose of adding cold alcohol (ethanol or isopropanol) to the aqueous lysate?
A
To lyse cell membranes by dissolving phospholipids and releasing DNA into solution
B
To precipitate DNA out of solution so it can be collected as a visible pellet or strands
C
To denature and digest proteins by breaking peptide bonds
D
To cleave DNA into smaller fragments for easier amplification
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