Biology 311C Lecture 31 - November 7, 2011 Biology 311C...

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November 7, 2011 Biology 311C Lecture 31 UGG codes for tryphtophan. UUU = phe, GGC = gly. UCA = Ser. (refer to chart) That strand that is read to make mRNA is called the template strand. An RNA copy is made which is then translated to make a polypeptide chain. Our cell knows which is the template strand to use because promoter in DNA which helps orient DNA polymerase and tells it where to start/direction to go. Each codon makes for one amino acid. (3 bases for one codon) In our genome, there are 20,000 genes so on each chromosomes, there are many genes. Not all genes are working at the same time, there is regulation. Proteins are being produced where they are needed. DNA is read from 3’ to 5’ while the mRNA is synthesized from 5’ to 3’. The machinery is moving along the DNA from 5’ to 3’. In transcription, you have initiation, elongation, and termination. The important locations are the promoter (in eukaryotic organisms there is the TATA
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