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If by the gel you mean in an electrophoresis test, then the DNA sorts itself out relative to the size of the DNA molecules. The shortest being closest to the positive end, and the longest near the negative end.
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What is a technique for sorting DNA fragments by length?
it is called " electrophoresis"
What holds the DNA sample during electrophoresis?
DNA samples are within the gel matrix during electrophoresis. DNA moves at differtent rates through the pores of the gel depending on how long the fragments are. DNA is held by the gel itself.
Why is DNA cut up before it is put into a gel?
Assuming you're talking about an electrophoresis gel for separating DNA: DNA is itself negatively charged because it contains phosphate groups. Thus, when you apply a current, it will move towards the positive electrode at the other end of the gel. If the DNA were placed at the positive end of the gel, it would migrate backwards and you'd lose the sample.
What procedure is used to separate and analyze DNA fragments by placing a mixture of DNA fragments at one end of a porous gel and supplying an electrical voltage to the gel?
agarose gel electrophoresis
Would you agree that if a person believes that their smallest DNA fragment is the band nearest the negative pole if the gel?
It is not possible for DNA fragment to be found towards the negative pole of gel. Reason being that the DNA itself is a negatively charged molecule and will always move towards the positive pole when the gel is run. Regarding the smallest fragment, it is impossible to find a band near the negative pole. When the gel is running the smallest fragment runs ahead of all the fragments. It could be found near the positive end, and also possible that if it is too small and the gel is not turned off on correct time then the fragment may overrun the gel from positive end.
What is a technique for sorting DNA fragments by length?
it is called " electrophoresis"
What holds the DNA sample during electrophoresis?
DNA samples are within the gel matrix during electrophoresis. DNA moves at differtent rates through the pores of the gel depending on how long the fragments are. DNA is held by the gel itself.
Why is DNA cut up before it is put into a gel?
Assuming you're talking about an electrophoresis gel for separating DNA: DNA is itself negatively charged because it contains phosphate groups. Thus, when you apply a current, it will move towards the positive electrode at the other end of the gel. If the DNA were placed at the positive end of the gel, it would migrate backwards and you'd lose the sample.
In gel electrophoresism DNA fragments migrate toward one end of a gel because that are?
DNA is naturally negative therefore when a positive charge in put to one side of the gel the DNA wants to move towards it.
Describe how do different fragments of DNA show up on a gel?
the chamber has a positive end and a negative end...the DNA moves through the gel toward the positive end (because DNA is negative). The smaller fragments move faster, therefore going further, and the larger pieces stay closer to the wells. what is DNA gel
Which of the following best describes how scientists use gel electrophoresis?
Gel Electrophoresis is the technique for sorting DNA molecules based on their number of base pairs by running a current through the gel. The sample travels opposite of the direction of the electrical charge since DNA is negatively charged. Using a certain primer you can identify the BP of the sample.
What procedure is used to separate and analyze DNA fragments by placing a mixture of DNA fragments at one end of a porous gel and supplying an electrical voltage to the gel?
agarose gel electrophoresis
How does DNA and gel electrophoresis relate?
Gel electrophoresis separates an individual's DNA fragments from one another according to size. An electric current repels a mixture of the negatively-charged DNA fragments through microscopic pores in the gel from the negative to the positive electrode. Upon completion, the separated fragments of DNA can be visualized as a ladder of small bands in the gel by staining with a methylene blue dye solution or smaller DNA segments move more easily through the gel.
Would you agree that if a person believes that their smallest DNA fragment is the band nearest the negative pole if the gel?
It is not possible for DNA fragment to be found towards the negative pole of gel. Reason being that the DNA itself is a negatively charged molecule and will always move towards the positive pole when the gel is run. Regarding the smallest fragment, it is impossible to find a band near the negative pole. When the gel is running the smallest fragment runs ahead of all the fragments. It could be found near the positive end, and also possible that if it is too small and the gel is not turned off on correct time then the fragment may overrun the gel from positive end.
What is true of the DNA fragment band closest to the positive end of the gel?
they are the smallest.
What does the charge of DNA have to do with DNA fingerprinting?
DNA is of a negative charge. So when gel electrophoresis is used on it the DNA fragments are attracted to the positive end of the electrophoresis. The fragments of different lengths travel down the gel towards this end. The longer length fragments travel less and so are farther from the positive end. By looking at these DNA fragments, which are created by cutting DNA with restriction enzymes one can compare and contrast DNA. Thus DNA fingerprinting can take place based on the different restriction sites in DNA (cut by the enzymes) forming different length segments of DNA.
Process that restriction fragments of DNA are separated from each other by the use of electricity?
The process is referred to as gel electrophoresis. This is an analytical process where DNA fragments can be separated based on size within a gel under the influence of an electric field
