How is DNA stable but able to be changed?
It will affect protein synthesis. mRNA uses DNA (a gene) as a template and mRNA is a template to join amino acids together. If the DNA sequence (gene) is changed, the mRNA will be changed, and the polypeptides will be changed - usually with harmful consequences. Proteins produce phenotypes in organisms, so a mutation in DNA causes abnormalities.
It servers as buffering agent to maintain a stable ph during the extraction/purififaction protocol; DNA is known to be most stable in neutral or slightly basic (pH7-8) solutions. Furthermore, the phosphate may bind to surfaces that would otherwise bind the DNA(phosphate backbone of DNA!) thus keeping the latter in solution; this helps with samples containing low amounts of DNA.
The subject you are talking about is probably genetic engineering. If you are able to take a gene from one organism and place it in another then you changed the DNA structure, which most likely can kill the plant, by possibly even creating a cancerous cell. But if the gene is transgenic enough the organism is a transgenic plant or animal.
Both DNA and RNA exist as single and double strands. yet the structure of a DNA is more stable then RNA. The main difference between the two nucliec acids is that DNA contains Deoxyribose and RNA contains ribose sugar which has a free hydroxyl group in its pentose ring which makes it prone for hydrolysis, thereby making it more unstable than the DNA.
A DNA polymerase is one of the crucial enzymes when DNA is synthesised. It is also the only enzyme needed when making DNA in the test tube, using a molecular biology technique known as PCR. In this reaction, the other enzymes that nature uses are are replaced by cycles of heating and cooling, up to 95 degrees Celsius. The DNA polymerase consists of protein, so normal DNA polymerase is of course destroyed in the heating…