10:9 Proteins and Nucleic Acids

Closer look t a a a a a c t t c t g a g a 3 5 5 3 a c

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Unformatted text preview: its regulatory sequence transcription factor (regulatory protein) transcription factor (regulatory protein) How genes are regulated: RNA polymerase RNA (single-sided and of a specific sequence) RNA promoter start 5' 3' (single-sided and of regulatory a specific sequence) sequence RNA polymerase termination signal promoter a gene start 5' 3' regulatory sequence 3' 5' a gene termination signal 3' 5' 11-6 (repressor) 3' 5' 5' 3' Positive Control: Positive control: DNA transcription RNA (single-sided and (single-sided RNA of a specific (gene, RNA polymerase) DNA transcription Zero Zero (gene, RNA polymerase) + + DNA transcription begins andsequence), of a specific other stuff sequence), Vmax Vmax activated ribonucleotides activated ribonucleotides 3' 5' 5' 3' other stuff regulatory protein-Z (activator) Regulatory protein-Z present Regulatory protein-Z present DNA transcription (gene, RNA polymerase) DNA transcription RNA polymerase VmaxVmax Zero Zero (gene, RNA polymerase) + + Genetic regulation Regulatory protein-Z absent Regulatory protein-Z absent A 5' ene that can be regulated—that is, a gene in which transcription can be turned on and off. g 3' promoter termination signal start 3' 5' 5' 3' a gene regulatory sequence Negative control: Negative Control: DNA transcription DNA transcription (gene, RNA polymerase) RNA polymerase (gene, RNA polymerase) Vmax ax Vm ZeZero ro 3' 5' DNA transcription begins 3' 5' 5' 3' Regulatory protein-A Regulatory protein-A present present DNA transcription DNA transcription RNA single-sided RNA ((single-sided Zero Zero (gene, RNA polymerase) (gene, RNA polymerase) RNA polymerase and of specific and of aaspecific sequence), sequence), other stuff other stuff max VVmax activated activated ribonucleotides ribonucleotides regulatory protein-A (repressor) 3' 5' 5' 3' Regulatory protein-A absent Regulatory protein-A absent Positive Control: Check your understanding: 1. Why is genetic regulation a necessay component for protein synthesis? DNA transcription begins 2. Does it ever make sense to have some genes whose transcription is not regulated, meaning that the gene is always turned on? If so, can you think of any genes that this concept might apply to? 5' 3' 3' 5' regulatory protein-Z (activator) RNA translation: RNA polymerase Genetic code: 3' 5' 5' 3' tRNAs: an amino acid attaches here 3' A C C 5' A GC CG GC GU AU Based on additional interactions, UA C U A each distinct type of tRNA folds UA GACAC further...
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This document was uploaded on 03/27/2014.

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