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DNA - Page Text Content

S: DNA Tyler Grotenhuis


1: DNA Tyler Grotenhuis Tyler Grotenhuis

3: DNA stands for deoxyribonucleic acid. DNA is a nucleic acid that contains the genetic instructions for the development and functioning of all known living organisms. The main role of DNA molecules is the long-term storage of information.

5: DNA is inside chromosomes and chromosomes are in the cell`s nucleus. DNA is two nanometers long, and one nanometer is one billionth of a meter.

7: DNA consists of two long polymers called nucleotides. The two long strands run opposite each other. Attached to each sugar is one of four types of molecules called bases. This information is read using the genetic code. The code is read by copying stretches of DNA into the related RNA, in a proccss called "transcription".

9: Each strand of DNA is made of just four chemicals: A, T, C, and G. A and T always go together and G and C always go together. A stands for adenine, G for guanine, T for thymine, and C for cytosine.

11: Cell division is very important for living things to grow. When a cell divides, it must copy its DNA so that the two "daughter" cells have the exact same DNA as the "parent" cell. The two strands are separated and then each strands' other side is recreated by an enzyme called polymerase.

13: Forensic scientists can use DNA in blood, semen, skin, saliva or hair found at a crime scene to identify a matching DNA of a person. This process is called genetic fingerprinting. This method is usually an extremely reliable technique for identifying matching DNA. However, identification can be complicated if the scene is contaminated with DNA from several people.

15: Bibliography Balkwill, Fran and Rolph, Mic. Have A Nice DNA. China: Cold Spring Harbor Laboratory Press, 2002. Barry, Patrick. "It is DNA Jim But Not As We Know It" Science News For Kids. August, 2008 p NA. Butterfield, Moira. Genetics. North Mankato: Smart Apple Media, 2004. Fridell, Fon. DNA Fingerprints, New York: Franklin Watts, 2001. Mowicki, Stephen. Scince lecture. Biology, The Science of Life [video recording (DVD)]. Chantilly: Teaching Co., 2004. Rainis, Kenneth. Blood and DNA Evidence. Berkeley Heights: Enslow Publishers, 2006

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  • By: tyler g.
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  • Title: DNA
  • Tags: dna
  • Started: almost 10 years ago
  • Updated: over 9 years ago