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In gel electrophoresis, which way does DNA move through the gel matrix?
In gel electrophoresis, DNA moves through the gel matrix from the negative electrode to the positive electrode.
Why does DNA have a negative charge?
DNA has a negative charge because it contains phosphate ions, which make up DNA's double helix structure. Also, DNA "has" to be negative since that is the only way histones and other molecules can bind to it.
Why is DNA negatively charged and why is this charge important for gel electrophoresis?
DNA is negatively charged because it contains phosphate groups in its structure, which carry a negative charge. This charge is important for gel electrophoresis because the DNA molecules will move towards the positive electrode in the gel due to their negative charge, allowing them to be separated by size.
From which group do the strong negative charges of DNA originate?
The strong negative charges of DNA originate from the phosphate groups in the DNA molecule.
What part of DNA gives the molecule a negative charge?
The phosphate groups in the DNA molecule give it a negative charge.
Did Justin DNA test come out positive or negative?
He didn't take it. When Mariah Yeater heard he agreed to take the test she dropped the claims.
Which test substances did not test positive for any of the organic compounds?
Charcoal and laundry detergent did not test positive for any of the organic compounds. Their tests results were negative for glucose, starch, protein, and lipid.
What do inconclusive mean on a DNA test result?
Inconclusive generally means that some of the compounds the test was trying to detect were found, but not in sufficient concentration to mean a positive result.
If the DNA of the mother is A and the child is A pos what is the DNA of the father?
Given that the mother's DNA is A and the child is A positive, the father's DNA must also contain the A antigen. The father could be A positive, A negative, AB positive, or AB negative.
How do you get negative paternity test?
That's a DNA test, it will only be negative if you are not the parent.
What color changes indicate a positive result for dische diphenylamine?
A positive result for dische diphenylamine test would be indicated by a deep blue color change in the solution. This color change indicates the presence of DNA, as dische diphenylamine reacts with deoxyribose sugars in DNA to produce a blue color.
Why does DNA move toward the positive electrode?
because DNA is of negative charge thus it will travel towards the positive pole due to attraction.....and the movement of the DNA is also facilitated by the repulsion of the positive pole which is near by to DNA
What is the impact of negative vs positive supercoiling on DNA structure and function?
Negative supercoiling in DNA involves the twisting of the double helix in the opposite direction of its natural spiral, while positive supercoiling involves twisting in the same direction. Negative supercoiling helps in compacting DNA and promoting transcription and replication, while positive supercoiling can hinder these processes. Overall, negative supercoiling is more beneficial for DNA structure and function compared to positive supercoiling.
What is the difference between positive supercoiling and negative supercoiling in DNA structure and how do they impact gene expression?
Positive supercoiling in DNA structure refers to the overwinding of the DNA helix, while negative supercoiling refers to the underwinding. Positive supercoiling can hinder gene expression by making it difficult for enzymes to access the DNA, while negative supercoiling can promote gene expression by making the DNA more accessible.
What is the result if the patient is having an HIV DNA laboratory examine when hbsag is negative?
The result is that the patient HIV infected if the hbsag is negative.
Would you expect to get a positive DNA test in a mature red blood cell?
No, mature red blood cells do not contain a nucleus or DNA. They lose their DNA as they mature to better accommodate their main function of carrying oxygen. Therefore, a DNA test on a mature red blood cell would be negative.
Does DNA samples start at the negative or the black charge?
When DNA samples are run (i.e. in gel electrophoresis) they start at the negative end. This is because DNA carries a negative charge, and so will move towards the positive electrode. Therefore the DNA is placed at the other end (so it has room to move).
