27+ 27 = 54 (how much T and A are in the sample) 100-54 = 46 (how much G and C are in the sample) 46/2 = 23% of the bases will be cytosine.
Then you also have 13% cytosine, 37% guanine, and 37% adenine.
If there is 20% T that means there is also 20% A. 20% + 20% = 40% 100% - 40% = 60% Since there is the same percentage of G and C 60%/2 =30% 30% C 30% G 20% T 20% A This is known as Chargaff's rule.
It's not that the individual hydrogen bonds are stronger but rather there are more of them. Between A and T there are two hydrogen bonds, between G and C there are three hydrogen bonds. The additional hydrogen bond between G and C does mean that the bonding between G and C is much stronger then that between A and T and requiring of significantly more energy to break.
Funnily enough, it is probably the other way round! Scientists believe, for various reasons, that RNA came first, and that there was an "RNA world" before DNA evolved. If this idea is correct, uracil was a component of nucleic acids before thymine. When DNA evolved, thymine may have proved a preferable material for storing genetic information because of its much greater stability; RNA breaks down relatively quickly, but DNA is stabilized by its double-stranded form. RNA is easily hydrolised than DNA. It is interesting to note that in our own bodies we can synthesize RNA from simpler compounds, but to make DNA we first build RNA nucleotides, then convert them. We remove one oxygen atom from the ribose component of the nucleotide, to form deoxyribose. Then, if the base is uracil, we add a methyl group to it to form thymine. But this leaves the question: what advantage does thymine have over uracil in DNA? One suggestion is this: cytosine (C) occasionally converts into uracil (U) by deamination. If this U is not removed, at the next replication it will act as a template for an adenine (A) on the new strand, and there will have been a mutation from G to A. Having thymine (T) as the regular base in DNA makes it easy for a cell to spot a deamination, because U should not be there at all. The cell then removes the U with a DNA repair enzyme (e.g. uracil glycosylase).
Affected? Hell, they're MADE from your DNA, pretty much... though of course they'e not made OF DNA - proteins consist of one or more polypeptide chains (which are chains of amino acids linked by peptide bonds). But, in short - your DNA is transcribed into mRNA (by particular enzymes, and enzymes are also proteins by the way...) - so basically a copy is made of your DNA - which is then translated into a polypeptide in little cell organelles called ribosomes - each 3 bases of DNA (or mRNA if you like...) codes for a particular amino acid, which is sort of brought to the ribosome by a tRNA molecule.... You know the bases, right? A, T, C, G, U (Adenine, Thymine, Cytosine, Guanine, Uracil)? Well, Adenine always binds with thymine, and cytosine always binds with guanine... and Uracil is the RNA equivalent of thymine. so here's an example of how it works (assuming the top strand of DNA is transcibed):
Then you also have 13% cytosine, 37% guanine, and 37% adenine.
For each person, Adenine, Thymine, Cytosine, and Guanine can be in different amounts. It what makes you you.
Erwin Chargaff is his name
Adenine , cytosine, guanine, thymine, and uracil.(acids) use yahoo answers, its much better and u get more answers
If there is 20% T that means there is also 20% A. 20% + 20% = 40% 100% - 40% = 60% Since there is the same percentage of G and C 60%/2 =30% 30% C 30% G 20% T 20% A This is known as Chargaff's rule.
It's not that the individual hydrogen bonds are stronger but rather there are more of them. Between A and T there are two hydrogen bonds, between G and C there are three hydrogen bonds. The additional hydrogen bond between G and C does mean that the bonding between G and C is much stronger then that between A and T and requiring of significantly more energy to break.
Lets look at it this way: Thymine and adenine are pieces of a jigsaw puzzle that matches. Cytosine and Guanine are also pieces of jigsaw puzzle that matches. A cytosine cannot match with thymine because the shape of cytosine will only match with the shape of a guanine. To look at it in another way: Thymine(uracil in RNA) and cytosine are pyrimidines. Pyrimidines are single-ringed organic base that will only attach to purines, or adenine and guanine by hydrogen bond. Because cytosine and thymine are both pyrimidines, it cannot form a hydrogen bond with each other.
Adenine does form a base pair with thymine (linked with two hydrogen bonds). Cytosine does form a base pair with guanine (linked with three hydrogen bonds). Both the number of the bounds and the spatial location of these bonds ensure that the correct bases pair in the double string DNA. Nitpicking: Note that adenine can of course bind with all the bases (A,T,C,G) otherwise a DNA sequence like CAG would be impossible.
It should say the discount on the price tag or It can be obove some thing. Or in that particular section it can have a percent off SALE.
50 percent!
DNA stand for DeoxyriboNucleic Acid.It is the genetic material of a cell. The chromosomes inside the nucleus (control centre) of the cell are made of DNA. Lots and lots of DNA. It is very fine and tightly coiled but there may be as much as a metre in a single cell.The four hydrogen bases - otherwise known as the DNA Alphabet - are ATCG - Adenine, Thymine, Cytosine, and Guanine. Adenine bonds only to Thymine, and Cytosine bonds only to Guanine.
How much is 13.28 percent of 2