DNA stands for Dioxyribonucleic Acid, which is basicly just the genetic stuff that makes up all cellular organisms. You could think of DNA as a "file" that has the instructions needed to create proteins, which make up all of us. The DNA molecule, itself, is safely kept inside the cells nucleus. You could think of it as the "filecabinet." DNA consists of two strands composed of a large number of chemical compounds, those are called nucleotides. They link together to form chains, which are arranged like a twisted ladder called a double helix. Each nucleotide is made up of three units: a sugar molecule, a phosphate group, and one of four nitrogen based compouds, called bases. The bases are adenine (A), guanine (G), thymine (T), and cytosine (C). These are the "rungs" of the ladder. A always links to T, and G always links to C.
When the cell multiplies into other cells, the DNA has to be "photocopied." This process of cell fragmentation is called mitosis. A special molecule called messenger ribonucleic acid, or mRNA is the photocopy of the original DNA and is transfered to the nucleus of the new cell by another type of molecule called transfer ribonucleic acid, or tRNA. You could think of tRNA as a person who takes the photocopy and puts it in a filecabinet.
The two main scientists who discovered the double helix of DNA are James Watso and Francis Crick. They discovered it in February of 1953, and in 1962 they both were awarded the Nobel Prize for physiolgy or medicine for their work.
James D. Watson was born in 1928 and is still alive today. He was a biochemist and Nobel Prize winner, who helped determine the structure of DNA today. He was born in Chicago, Illinois and went to college when he was only 15 years old. When he was 22 he got his Ph.D degree at the University of Indiana in 1950. In 1955 he became a proffesor at Harvard University, and from 1951_1953 he did some postgraduate work with a British biophysicist, Francis Crick.
Some viruses do not have DNA, but contain RNA instead. ... (Heath, 110) DNA can also be found outside of chromosomes. ... DNA contains four nitrogenous bases. ... The new DNA strand stays attached to the old one through the hydrogen bonds, and together they form a new DNA double helix molecule. ... RNA molecules are like DNA. ...
DNA is a big step for science. Yet many people don't know the purpose of DNA and what it really can do, but DNA is actually a big thing. ... DNA also contains much more personal information than a fingerprint. ... They could also destroy years of investigation by destroying the DNA-files. ... A DNA profile is a string of numbers stored on a computer. ...
DNA fingerprinting has many advantages and disadvantages. ... What if DNA fingerprinting also helped reduce crime? ... To an extent, no two people have the same DNA sequence. DNA is also durable. ... As mentioned earlier, not all courts accept DNA fingerprin...
DNA I am going to write about if Law Enforcement should team up with doctors to try and make society a safer and better place. ... Look at the potential DNA has to offer in solving a crime it is unbelievable. ... There is nothing wrong with taking DNA from a criminal and keeping it on record, even if it's from just a violent offender. ... Next I would like to put my emphasis on how good of an idea it is to take DNA from a newborn, unlike Mary Faith. What's wrong with taking DNA from a newborn and keeping a database, maybe and hopefully, it could deter and slow down crime in the Uni...
DNA Testing DNA technology has provided law enforcement officers and investigators with a way to solve many crimes that would have previously been unsolvable. DNA technology has improved the way we solve crimes. ... DNA is similar to fingerprint analysis because every person's DNA is different. When DNA is found at a crime scene it is compared to DNA that is already on file to determine if it is a match, much like if it were a fingerprint. ... Without DNA testing hundreds of criminals would be free. ...
However there are many disadvantages to DNA testing, such as a challenge of accuracy, the costs of DNA testing and the possible misuse of DNA. ... However many people disagree to the use of DNA results. Many question the accuracy of DNA evidence, as only DNA segments are used in databases in contrast to the entire DNA strand. ... DNA testing is also very expensive, and the accused might not be able to afford a DNA expert to defend him or herself in court if DNA evidence is used against them, and if DNA experts are hired for them, there is a possibility of bias. ... Victoria has had a DNA datab...
DNA Fingerprinting: Guilty or Innocent? ... DNA tests also work with sites in DNA that have different lengths because of their variable numbers of repeated units (VNTRs) (Housman 543). ... This procedure, called "amplification," which uses DNA polymerase to create exact copies of fragment of DNA in a test tube at very high rates, reaches a result in several hours ("DNA Identification" 4). ... Technology's first legal test on DNA took place in 1987. ... "DNA tests can absolutely eliminate someone," says L.A. public defender Walter Krustjla, who is a DNA chemist as well as a lawyer ...
The Drawback of DNA Evidence Outline I. Introduction a. Definition of Evidence b. Three Ways to Solve a Crime c. Thesis II. A Mistaken DNA Identification? What Does It Mean? a. The Odds of Having Similar DNA b. Outcome of the Case III. Other Point of Views from Experts a. Views fro...
Cole Cuchna Per 3 Molecule of the Month: DNA The "thread of life", is deoxyribonucleic acid, otherwise known as DNA. ... DNA can be manipulated to change all kinds of things. ... DNA is damaged by exposure to ultraviolet (UV) light. The DNA does have the ability to repair it self, however. DNA can also be used to match suspects in a crime. ...
