Biolog 14 - Chapter 14: DNA to Protein I. Transcription A....

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Chapter 14: DNA to Protein I. Transcription A. mRNA carries protein-building codes to transcribe rRNA and tRNA from genes. B. In RNA, fourth base is uracil instead of thymine C. The promoter starts the base sequence and the introns are snipped out while the exons make the base sequences. II. Genetic Code A. Sixty four different codons from base triplets in mRNA. B. Different codons (base triplets) specify different amino acids III. RNAs A. tRNA has site for attachment of amino acids B. interaction between tRNA and mRNA take place at ribosomes C. ribosome is made of rRNA and structural proteins D. Polypeptide chains are built on the ribosomes with large and small subunits IV. Translation A. Initiation stage UAC codon methionine must start the sequence Anticodon + codon meet up when initiator tRNA binds to small ribosomal subunit B. Elongation stage Large and small ribosomal subunits create polypeptide chain Enzyme catalyzes formation of peptide bonds in amino acids C. Termination
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This note was uploaded on 12/03/2011 for the course CHEM BIO P 101 taught by Professor Kk during the Spring '11 term at Rochester.

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Biolog 14 - Chapter 14: DNA to Protein I. Transcription A....

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