BIOLOGY 1A03 Lecture Notes - Lecture 3: George Gamow, Start Codon, Genetic Code

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BIOLOGY 1A03 Full Course Notes
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BIOLOGY 1A03 Full Course Notes
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Mo d u le 2 th e ge n e tic co d e. Un it 1: ge n e tic co d e: deciphering code in mrna. Proteins are made from 20 different amino acids, but there are only 4 nucleotides in mrna (a,c,u,g) Un it 3: de c ip h e rin g th e co d e: simple mrna: simple repeated sequence of nucleotides is translated into a simple repeated sequence of identical amino acids. This repeated tract of uracils and cytosines produces a strong of alternating amino acid residues: simple mrnas were used to determine specific amino acid encoded in each triplet codon. Un it 4: s ta n d a rd co d e: only nucleotide triplet aug codes for methionine. First triplet in every protein coding sequence. Aug start codon that signals the region where protein synthesis should begin: there are many examples of redundancy.

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