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Compare and contrast the properties of DNA polymerase and RNA polymerase, listing at least three similarities and at least three differences between the molecules.
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Ch. 8 - Molecular Biology of Transcription and RNA Processing
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172
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TOC.tableOfContents
- Ch. 1 - The Molecular Basis of Heredity, Variation, and Evolution64
- Ch. 2 - Transmission Genetics144
- Ch. 3 - Cell Division and Chromosome Heredity81
- Ch. 4 - Gene Interaction87
- Ch. 5 - Genetic Linkage and Mapping in Eukaryotes103
- Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages73
- Ch. 7 - DNA Structure and Replication71
- Ch. 8 - Molecular Biology of Transcription and RNA Processing79
- Ch. 9 - The Molecular Biology of Translation110
- Ch. 10 - Eukaryotic Chromosome Abnormalities and Molecular Organization100
- Ch. 11 - Gene Mutation, DNA Repair, and Homologous Recombination86
- Ch. 12 - Regulation of Gene Expression in Bacteria and Bacteriophage90
- Ch. 13 - Regulation of Gene Expression in Eukaryotes38
- Ch. 14 - Analysis of Gene Function via Forward Genetics and Reverse Genetics72
- Ch. 15 - Recombinant DNA Technology and Its Applications69
- Ch. 16 - Genomics: Genetics from a Whole-Genome Perspective49
- Ch. 17 - Organelle Inheritance and the Evolution of Organelle Genomes27
- Ch. 18 - Developmental Genetics43
- Ch. 19 - Genetic Analysis of Quantitative Traits66
- Ch. 20 - Population Genetics and Evolution at the Population, Species, and Molecular Levels105
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172Non è quello che usi tu?Cambia libro di testo
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Sanders 3rd EditionCh. 8 - Molecular Biology of Transcription and RNA ProcessingProblema 5c
Sanders 3rd EditionCh. 8 - Molecular Biology of Transcription and RNA ProcessingProblema 5cCapitolo 8, Problema 5c
The following is a portion of an mRNA sequence:
3'-AUCGUCAUGCAGA-5'
Identify the direction in which the promoter region for this gene will be located.
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Understand that the mRNA sequence provided is written in the 3' to 5' direction, which is unusual because mRNA is typically written in the 5' to 3' direction. This means we need to reverse the sequence to analyze it properly.
Reverse the sequence to obtain the standard 5' to 3' orientation: 5'-AGACGUACUGCUA-3'. This is the correct orientation for interpreting the mRNA sequence.
Recall that the promoter region is located upstream of the transcription start site. In the context of the mRNA sequence, 'upstream' refers to the direction opposite to the synthesis of the mRNA strand.
Determine the direction of transcription. Since mRNA is synthesized in the 5' to 3' direction, the promoter region must be located upstream, which corresponds to the 5' end of the template DNA strand (or the 3' end of the mRNA sequence).
Conclude that the promoter region for this gene will be located in the direction corresponding to the 3' end of the provided mRNA sequence, as this is upstream relative to the transcription process.
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mRNA Directionality
mRNA is synthesized in the 5' to 3' direction, meaning that the 5' end of the mRNA corresponds to the start of the coding sequence. The sequence provided is in the 3' to 5' orientation, indicating that the actual coding sequence runs from the 5' end of the mRNA to the 3' end.
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05:02
Directionality
Promoter Region
The promoter region is a specific DNA sequence located upstream of a gene that initiates transcription. It is typically found at the 5' end of the coding sequence and is recognized by RNA polymerase and transcription factors, which bind to it to start the process of mRNA synthesis.
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00:30Regions of X Chromosomes
Transcription Initiation
Transcription initiation is the first step in gene expression, where RNA polymerase binds to the promoter region and unwinds the DNA. This process determines the direction of transcription, which will always proceed from the promoter towards the 3' end of the template strand, thus establishing the orientation of the mRNA produced.
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09:16Eukaryotic Transcription
Pratica correlata
Domanda del libro di testo
The following is a portion of an mRNA sequence:
3'-AUCGUCAUGCAGA-5'
Write out the sequence and polarity of the DNA duplex that encodes this mRNA segment. Label the template and coding DNA strands.
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The DNA sequences shown below are from the promoter regions of six bacterial genes. In each case, the last nucleotide in the sequence (highlighted in blue) is the nucleotide that initiates transcription. Determine the consensus sequence for the Pribnow box from these sequences.
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The following is a portion of an mRNA sequence:
3'-AUCGUCAUGCAGA-5'
During transcription, was the adenine at the left-hand side of the sequence the first or the last nucleotide used to build the portion of mRNA shown? Explain how you know.
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The diagram below shows a DNA duplex. The template strand is identified, as is the location of the nucleotide.
If this region is a eukaryotic gene transcribed by RNA polymerase III, where are the promoter consensus sequences located?
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Domanda del libro di testo
The DNA sequences shown below are from the promoter regions of six bacterial genes. In each case, the last nucleotide in the sequence (highlighted in blue) is the nucleotide that initiates transcription. Examine these sequences and identify the Pribnow box sequence at approximately -10 for each promoter.
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