Dna Definition and 386 Threads

Net Force in a DNA molecule?? Homework Statement The two strands of the helix-shaped DNA molecule are held together by electrostatic forces as shown in Fig. 16-44. Assume that the net average charge (due to electron sharing) indicated on H and N atoms is 0.2e and on the indicated C and O...

I was wondering what happens to an organ after it's transplanted in another body. Obviously it starts off with the DNA of the donor. However I find it odd that there is something in your body with different DNA then yourself. So I'm wondering if the DNA of the organ eventually changes into...

Since nucleotides are molecules, how does quantum mechanics pertain to DNA and RNA? I have heard there is the study of stability of the DNA and RNA molecules, for instance. What does DNA and RNA actually look like -- as opposed to textbook drawings which illustrate spherical balls attached to a...

Homework Statement The question can be found on this link. It is the last question, the one with the DNA molecules. Prof said that the direction is not important, he is just looking for a magnitude. http://www.phys.uvic.ca/medphys/people/AJ/Courses/Phys216/Assignments/P216-A1-2007.pdf...

I am doing some biology research and need to check if a DNA sequence for complexity and repetitiveness, using Empirical test like Frequency test, Serial test and etc. For that I need to represent or convert the sequence into scalar. My question is basically, how to apply those tests on...

What is the value of prob(conclusion C1 is true IF premise P1 is true)? It depends on the prior probability that the suspect's DNA would be found at the crime scene -- which makes it a true match for some crime scene DNA -- and the true and false positive rates for the police forsensics lab...

...the puppy that never grows old, bug DNA kits for designing your own bugs, Control Genes [found in every dictator], Orangutans who can speak English, Spanish, or Japanese, and ear enlargements for improved hearing are just a few of the wonderful new products available from Michael Crihton's...

Hello, I'm trying to compile a list of factors that could cause a DNA strand to be damaged or modified (denaturalized). I'll list a few that I can think of, if you can add some or nix some of mine, please help me and reply, thanks. 1. Radiation (like gamma rays from the sun) 2...

What would a mole of mammal DNA look like? Smell like? Feel like? How about a mole of plant DNA?

how are DNA and proteins similar in structure? :confused:

How much different are the DNA of chimps and humans. I've read in a magazine that it is 98-99 percent. But, my friend tells me 95%. Who is right? And what is the difference between 98 and 95 percent in terms of the quantity of genetic code?

Does the single-handedness of DNA and RNA indicate that life originated few times, if more than once? What might the sameness between early sequences (in bacteria, say) indicate in this regard?

http://img19.imageshack.us/img19/5510/dnaphysicscg8.jpg I have the numbers for the marker. So to find out size the fragments I just match the numbers on the markers to the bright spots that I circled right. I just need to double check.

Is it possible to create a type of life form using DNA which doesn't match the DNA of that life form as we know it? For example, could we artificially create some type of DNA for a "cocker spanial" that didn't match a cocker spanial's DNA, but would produce a matching life form that looked and...

Why am I this brain and not another brain, I heard that if a sample of DNA was taken of me and I could be brought back to life in 1000 years it would be a copy of me but I wouldn't actually be me so to speak, Is this correct? Why am I not in control of someone elses body. To quote Richard...

...so says an NYT article. You can find the link here. Moderator edit: substituted a direct link to the NY Times article.

The persistence length of a double stranded DNA is reported to be ~ 150 bp. If so how can DNA of ~100 bp and less bend or circularize? Or is the definition of persistence length wrong ?

According to one estimate, our planet exposes itself to meteor showers in particular once every 26,000,000 years. Our genetic ancestors often had to adapt to the extreme conditions presented by such catastrophic potential. This included natural selection that could have passed down a special...

Hi everyone, I ran a gel for restriction digestion and used lamda HindIII as the marker. When I'm drawing the graph on a semi-log paper, size on y-axis and distance from the well on the x axis, the standard curve isn't a straight line, but a linear curve. Is it fine? Another question: the...

Found this link on dig.com: http://www.latimes.com/news/local/la-me-mormon16feb16,0,5561316.story I think it is good that people are scientifically testing religious beliefs.

Has anyone experimented with this? Take 2 stem cells. Take the DNA portion out of the one cell and place it inside the second cell. using the same method that the cloning stuff does it. Or would this method basically just cause mitosis to separate the cells anyway. or would it just kill the...

Given high and approximately equal concentrations of nucleotides Adenine, Cytosine, Guanine and Thymine in aqueous solution, how readily could a simple DNA molecule form there?

It is my understanding that the DNA guys have concluded that all Homo sapiens originated as progeny of a single "Eve" in Central(?) Africa. Since I haven't heard anything about "Adam," I assume that the genetic tracers don't allow anything to be said about the male lineage. Be that as it may...

Hi, I was doing this question & I just want to make sure I've got it correct: A quantity of DNA was labelled with radioactive nitrogen. It was then allowed to replicate three times using non radioactive to synthesise the new DNA strands. What proportion of the final mass of DNA would you...

Hope this doesn't sound too silly, but I seem to recall hearing someone say that our species future potenial, I guess our next evolutionary steps are already coded into the DNA. Now this doesn't seem to make to much sense to me, but maybe its BS. Anybody ever hear anything like this? dleacock

Hi Guys, I've read a couple random pieces on Biophoton emissions from DNA and was quite interested in the topic. There seem to be quite a few suggestions that this could be some form of inter cell communication system. Before I waste a lot of time reading the wrong material I was hoping...

Can someone please tell me what is the difference of non-canonical and canonical DNA segments? I have searched for in the net, but have not got any good explanations of these names. Thank you alot!

If a DNA molecule containes 28% thymine, what percent of it will be cytosine? will it be 72%? please help, thank you

How much would a DNA screen reveal about someone's personality and intelligence? :confused:

I need some online source . explaining how do we take a DNA sample from body cells.Preferably in a more advanced language .

Hi, My question asks to: List the methods that use the complementary base pairing properties of DNA (hint; any methods that use DNA-DNA or DNA-RNA hybridization); include those that we covered in Recombinant DNA Technology and Genomics. You can include a few extra ones from the book...

Why there is uracil in RNA instead of thymine and why not in DNA? Thanks.

If genes determine political orientation, which has been suggested a number of times in recent years, http://www.apsanet.org/imgtest/GeneticsAPSR0505.pdf then isn't democracy a bit of a genetic crap shoot? Depending of course on the total influence of one's genetic, political orientation...

In eukaryotes, DNA polymerase works in one direction only. Does that mean that one enzyme works simulteneously on both new strands, or is there on polymerase working on each strand. If the latter is true, then the two strands are independent of each other in a sense. If so, which polymerase...

junk DNA? hi over 97% of genes in the human genome are called 'junk dna'. what do you think is the junk dna for? ( beside regulatory functions, accumulated DNA of failed viruses, reservoire from which potentially advantageous new genes can emerge,... ) please give me your assumptions...

So, if DNA is supposed to be the code, or language by which our body, or our cells figure out what to do where and such. I guess I'm asking how do the cells know what the DNA is saying to them? What chemical stuff is going on that let's them 'read' the DNA and act appropriately. And wouldn't...

how long can dna get? I read about 2.3 cm long!

In DNA, the two purines are Adenine and Guanine and the two pyrimidines are Thymine and Cytosine. NOw...in DNA...Adenine pairs with Thymine and Guanine pairs with Cytosine. A purine pairs with a pyrimidine. That explains why Adenine cannot pair with Guanine and why Thymine cannot pair with...

Does this imply the possibility that we can influence our DNA with our own consciousness and therefore influence our evolution at will? Or is this 'just' another case of self-healing.

Why does single strain DNA moves slower then double strain DNA in gel electrophoresis? I think that it is because single strain DNA has less electrical charge than double DNA helix, and single strained binds with H bonds uncharged molecules thus increasing it’s mass.

Does anybody have a good protocol for DNA - bead attachment ? The Bead is streptavidin coated and the DNA has biotin and DIG on its ends.

If red blood cells don't have nuclei, then does this mean we can't find DNA in blood? Thanks

Where to and how far has your DNA migrated? Has it been incorporated by bacteria, transformed into viral RNA, preserved in permafrost, digested by animals, absorbed by plants, lofted miles into the atmosphere, tunnelled through subterranean aquifers, or passed on in some semblance to the next...

Tumors are caused by the demethylation of DNA sections. But what causes the demethylation? Thanks

I read this little article today, regarding self-building drug delivery systems. It reads a lot like how our immune system works. Then again, my degree in molecular biology is something for my next lifetime. This is from Scientific American...

Is there by any way one can concentrate the DNA in a solution ?

What is the minimum no. of bases needed for circularising DNA ? or What is the length of the smallest circular DNA ?

Are the whole processes of DNA, RNA, ribosomes, amino acids and proteins all just "chemical reactions" or is there something more to it? I know the way it works from DNA to protein but why? I understand this question might have a very complex anwser but a brief explanation would be...

In general how do DNA-Binding proteins bind to DNA? Many DNA-binding proteins bind to specific sequences of DNA bases. How do the proteins accomplish this sequence recognition. My answer: In general, DNA binding proteins possesses certain structural motifs, such as helixes, which enable...

Is there anyway by which one can selectively prevent 3' end or 5' end of the DNA from ligation?