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Why does clear soap help extract DNA from cheek cells?
In eukaryotic cells, which all animal and plant cells are, DNA resides in the nucleus, which is surrounded by a nuclear membrane. The membrane is made primarily of a kind of fat (lipid) molecule called a phospholipid. Lipid molecules repel water, which you know if you have tried to wash greasy dishes in ordinary water -- it doesn't work so well. Soap substances break down the surface tension of water so that water can then dissolve lipids, which is why you have to use soap to wash anything greasy. Soap also dissolves the lipid molecules in the nuclear membrane, so it is helpful in getting the DNA out of the nucleus so it can dissolve freely in the water. Any soap will do, it doesn't have to be clear. The main ingredient of soap which dissolves the lipid membrane is sodium dodecyl sulfate.
What is a hypothesis for strawberry DNA extraction science fair project?
A hypothesis for a strawberry DNA extraction science fair project could be that the addition of a detergent or soap solution will help break down the cell walls of the strawberry, allowing for more efficient DNA extraction compared to just using water.
Why is the purpose of the clear soap in the experiment for DNA?
The clear soap in the DNA extraction experiment serves to break down the cell membranes and nuclear membranes, which are composed of lipids and proteins. By disrupting these membranes, the soap allows the DNA to be released from the cells into the solution. This step is crucial for isolating the DNA so that it can be separated and analyzed.
What is the purpose of soap in strawberry extraction?
The purpose is to help the mixture of salt water and ethanol so the can find the DNA of strawberry bananna etc. Extrsctions
How does salt soap and ethanol extract DNA?
Salt soap helps break down cell membranes, releasing DNA from cells. Ethanol is added to DNA-containing solution to precipitate DNA out of solution, as DNA is not soluble in ethanol. The DNA can then be collected by spooling or centrifugation.
What reference would a DNA test be if the child in question was given up for adoption?
The DNA test could show the biological parents of the child. This could come into play in an adoption if a father was challenging the adoption.
What is the purpose of using soap in a DNA extraction buffer?
Soap is used in a DNA extraction buffer to break down cell membranes and release DNA from cells. It helps to disrupt the lipid bilayer of the cell membrane, allowing the DNA to be released into the extraction buffer for further processing and purification.
Does water contain DNA?
No, water does not contain DNA. DNA is a molecule found in the cells of living organisms, not in water.
If sperm is on your hand and you wash it can it be trased for DNA purpose?
Yes the DNA can be erased if the hands are washed thoroughly with soap and a good strong disinfectant.
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.
How does ethanol allow DNA strands to form?
It causes it to condense or precipitate out of the soap solution.
Where do scientists get DNA from for crimes?
DNA can come from all kinds of sources. Blood is the most obvious one; when you stab someone, for example, the knife gets slippery with blood, and you often end up cutting your hand. DNA could also come from saliva left on a glass or bottle or soda can. Or a toothbrush, a discarded cigarette butt, or the backside of a stamp that someone licked. It could come from a head hair that came off on a towel or hairbrush, or a pubic hair in the bedsheets or on the toilet seat. It could come from a used Band-Aid, or a used condom, or a snotty tissue, or a bloody tampon applicator left in the trash. You can even get DNA from vomit, urine and feces.
