(a) The initiation factors form a complex with RNA polymerase Gene is switched ON Gene is switched OFF Does NOT affect the gene expression (b) RNA polymerase binds at the upstream region. Gene is switched ON Gene is switched OFF Does NOT affect the gene expression
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Gene is switched ON
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Gene is switched OFF
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Does NOT affect the gene expression
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(b)
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Gene is switched ON
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Gene is switched OFF
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Does NOT affect the gene expression
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- 1. (a) Binding of transcription activator protein Gene is switched ON Gene is switched OFF Does NOT affect the gene expression (b) the RNA polymerase binds at the promoter region Gene is switched ON Gene is switched OFF Does NOT affect the gene expression1. (a) Binding of inducer protein to repressor protein Gene is switched ON Gene is switched OFF Does NOT affect the gene expression (b) Repressor protein binding at DNA upstream Gene is switched ON Gene is switched OFF Does NOT affect the gene expression (c) Operator is not bound with the repressor Gene is switched ON Gene is switched OFF Does NOT affect the gene expressionA cell has a mutated mediator protein. a) How will this affect transcription of genes? (circle an answer below) No transcription Weak transcription will occur Strong transcription will occur b) Why? Describe your choice above
- 5. a) Describe, using a diagram or point form notes, what is happening during transcription and translation of protein synthesis. Indicate where these events take place in the cell. b) An error occurs in the transcription of the original master strand of DNA. At the very first base pair, a guanine is substituted for cytosine. State the possible effects on the polypeptide and its functions.2. Which one is not a part of the transcription unit? a) RNA primase b) Promoter c) RNA coding sequence d) TerminatorWhich statement is false: A) Each type of protein ( ex: hemoglobin vs trypsionngen) varies in the length and amino acid sequence of its peptide B) After the rpocess of transcription is complete, the mRNA that is produced will continue being tranlsated by ribosomes for the rest of the cells life. mRNA never breaks down C) A ribosome will bind to an mRNA and will translate the sequence by reading one codon at a time and adding one amino acid to the peptide chain. It will stop the translation once it encounters a stop codon D) The gene for a protein provides the information on the legth of the peptide, along w the amino acid sequence so the protein can be synthesized by a ribosome E) Once mRNA has left the nucleus, ribosomes will bind to it and will follow the instructions in its sequence to make the new protien
- Rho: 1. Creates the transcription bubble so that transcription begins 2. Is a helicase for the RNA DNA hybrid 3. Recruits several general transcriptions factors to the pre initiation complex 4. Is one of the transcription factors for RNA polymerase 2Matching type Choices are in the picture 1. simultaneous and rapid process producing mRNA and polypeptide 2. cleaving the polypeptide by adding water 3. three initiation factors are required to commence the process 4. removal of gene segment disrupting the message 5. single mRNA codes for the proteome1) Describe the dna transcription-mRNA with all the step.
- a)Describe the process of transcription in prokaryotes b) Explain how proteins can be targeted for specific sites within the cellEnhancers and silencers increase or decrease transcription levels from the distance bind to the RNA polymerase are essential for chain elongation are essential for terminationa. Use circles for activators and squares for repressors. Draw the shapes bound to each promoter region. b. Under the word gene write “ON” or “OFF” to indicate if the gene is transcribed or not under the different conditions.