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
This is the end of the preview.
access the rest of the document.