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Ethanol

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10y ago

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Why chilled ethanol is added for DNA isolation?

to precipitate extracted DNA


Why is isopropanol used to precipitate DNA and what does it do to DNA to make it precipitate?

As DNA is completely soluble in water, but not in alcohol, like isopropanol, when isoprop is added, its engaged more and more water molecule to interact, as a result, less water molecules are available to dissolve DNA, and DNA statrs ppt out.


What kind of precipitate is formed when alcohol is added to denatured DNA?

When alcohol is added to denatured DNA, a white stringy precipitate of DNA will form. The DNA precipitates out of the solution because of its insolubility in alcohol, allowing it to be separated from the rest of the solution.


Why does DNA uncoil and precipitate in ethanol but not in water?

BECAuse it does...


Why do you use NaCl in DNA extractions?

Sodium chloride help to precipitate and separate DNA.


Role of peg in plasmid DNA isolation?

PEG (polyethylene glycol) is commonly used in plasmid DNA isolation to precipitate the DNA. When mixed with DNA in a high-salt buffer, PEG causes the DNA to aggregate and precipitate out of solution. This allows for separation of the plasmid DNA from other cellular components, making it easier to purify the DNA.


Why does ethanol precipitate DNA during the extraction process?

Ethanol precipitates DNA during the extraction process because DNA is not soluble in ethanol. When ethanol is added to the DNA solution, the DNA molecules become less soluble and clump together, forming a visible precipitate that can be collected and separated from the rest of the solution.


Is alcohol used to precipitate DNA?

Yes, alcohol (such as ethanol or isopropanol) is commonly used to precipitate DNA from a solution. When added to a DNA solution, alcohol causes the DNA molecules to come out of solution and form a visible white precipitate, which can then be collected by centrifugation.


What is the function in the following reagents used in the extraction and precipitation of DNA?

The function of phenol-chloroform is to denature proteins and extract DNA into the organic phase, while the function of isopropanol is to precipitate DNA by causing it to become insoluble in the solution.


What type of molecule has to be stripped from DNA before it will precipitate out solution?

water, H2O


How sodium chloride work in DNA extraction?

Sodium chloride is often used in DNA extraction to help precipitate the DNA, making it easier to separate from other cellular materials. When added to a DNA sample, sodium chloride helps to neutralize the negatively charged phosphate groups on the DNA molecule, causing the DNA to come out of solution and form a visible precipitate that can be easily collected.


What causes the DNA to precipitate and spool on the rod?

The alcohol used causes the precipitate to form due to a reaction allowing the hydrogen bonds between the nucleotides to form, which causes the DNA to become efficient packed and twisted together.