Saturday, May 3, 2014

do you know how to define genes?


genes are made up of DNA. DNA in turn is made of mulititude of nucleutides. Nucleotide is a chemical compound made up of a nitrogen base, phosphoric acid and sugar.

genes are more known for its function in heredity but it is also respsonsible for the daily activity of the cell : that's why it is called the control center of the cell. Cytoplasmic activity is the due to enzyme-regulated chemical reactions. Genes dictate the kind of structural and globular protein that will be produced. The specialization of cellular function for instance is controlled by the genes.

But genes are inside the nucleus and to command cytoplasmic acitivity it needs to exert its control in the cytoplasm by some mechanism. This is thru RNA synthesis. With specificity of nitrogen base pairing this control mechanism of the genes is almost perfect till the code is translated in the cytoplasm

http://www.johnkyrk.com/DNAtranslation.html

simplified transcription http://www.ncc.gmu.edu/dna/mRNAanim.htm
http://www.stolaf.edu/people/giannini/flashanimat/molgenetics/transcription.swf

translation of the message simplified http://www.stolaf.edu/people/giannini/flashanimat/molgenetics/translation.swf


what happened in mutationhttp://www.biostudio.com/d_%20Streisinger%20Model%20of%20Mutation.htm

when mutation occurs then that's the start of the malignant growth or cancer
http://www.pbs.org/wgbh/nova/cancer/grow_flash.html