UNIT+5-+NUCLEIC+ACIDS

=Nucleic Acids =

  Animations and Videos  Check out this web site for a nice overview:  http://www.pbs.org/wgbh/aso/tryit/dna/ Overview and Objective

Nucleic Acids, in other words, DNA and RNA. DNA stands for deoxiriboneucleic acid and is the coding for the production of proteins within an organism. DNA exists as two helix strands of coding. This coding is duplicated by Transcription into mRNA. The purpose for this is to aglow the message within the DNA to be able to leave the nucleolus. This m(//messenger)//RNA moves from the nucleus into the cytoplasm to the ribosomes where they will then create proteins- the building blocks of life.



mRNA, once on the ribosome, mRNA begins to code for proteins. At this time another type of RNA called t(transfer)RNA matches itself in groups of three, called codons. The mRNA moves along, each codon (three bases) matches with an anticodon (three bases on tRNA) which is connected to a peptide. As more of these peptides are chained together they become a poli(multiple)peptide chain. this chain then detaches when it receives a message from a specific codon on the mRNA. After being detached the polipeptide chain folds and crumples onto itself and forms a lose ball, that we call a protein.

Vocabulary: Double Helix- who separate strands of DNA. *a twisted ladder* DNA- The coding for proteins found within the nucleus of a cell mRNA-an opposite strand of coding, mirroring DNA, so that it's message can leave the nucleus RNA- single strand of genetic coding. RNA, unlike DNA contains Uracil tRNA- the anticodon. brings peptides matching the codon (tRNA) in order to form the necessary polipeptide chain.

 Bibliography

__Biology Conections and Connections__. 27 Jan. 2009 .

__Chapter 10: Molecular Biology of the Gene__. PowerPoint Slideshow. Mrs. Graham, 2008.

"DNA Replication." (Online) Available http://www.bioteach.ubc.ca/TeachingResources/MolecularBiology/DNAReplication.swf, 27 January 2009.

title page: Spence