Textbook Question
In terms of the polycistronic composition of mRNAs and the presence or absence of Shine–Dalgarno sequences, compare and contrast bacterial, archaeal, and eukaryotic mRNAs.
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Ch. 9 - The Molecular Biology of Translation
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172
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Table of contents
- 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: 9780135564172Not the one you use?Change textbook
Chapter 9, Problem 39a
Answer the following questions about the accompanying diagram.
Is the DNA nearest A the template strand or the coding strand?
Verified step by step guidance1
Step 1: Understand the difference between the template strand and the coding strand. The template strand is the DNA strand that serves as a template for RNA synthesis during transcription. The coding strand, also known as the non-template strand, has the same sequence as the RNA transcript (except thymine is replaced by uracil in RNA).
Step 2: Examine the accompanying diagram carefully. Look for any labels or indications that specify the direction of transcription or the strand being used as a template.
Step 3: Identify the strand nearest to point A in the diagram. Determine whether it is being used as the template for RNA synthesis or if it matches the sequence of the RNA transcript.
Step 4: If the strand nearest to point A is complementary to the RNA sequence being synthesized, it is the template strand. If it matches the RNA sequence (except for uracil replacing thymine), it is the coding strand.
Step 5: Confirm your answer by checking for additional clues in the diagram, such as the presence of RNA polymerase or the direction of transcription, which can help clarify the role of the strand nearest to point A.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Template Strand vs. Coding Strand
In DNA transcription, the template strand is the strand that RNA polymerase uses to synthesize RNA, while the coding strand has the same sequence as the RNA (except for thymine being replaced by uracil). Understanding which strand is which is crucial for interpreting genetic information and predicting the resulting RNA sequence.
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Double Strand Breaks
Directionality of DNA Strands
DNA strands have directionality, indicated as 5' to 3' and 3' to 5'. The template strand is read in the 3' to 5' direction during transcription, allowing RNA to be synthesized in the 5' to 3' direction. Recognizing this directionality is essential for determining the roles of the strands in transcription.
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Role of Promoters in Transcription
Promoters are specific DNA sequences located upstream of a gene that signal the start of transcription. They are crucial for the binding of RNA polymerase and the initiation of RNA synthesis. Identifying the promoter region helps in understanding which strand is the template strand based on the transcription start site.
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Related Practice
Textbook Question
Organisms of all three domains of life usually use the mRNA codon AUG as the start codon.
Do organisms of the three domains use the same amino acid as the initial amino acid in translation? Identify similarities and differences.
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Textbook Question
Organisms of all three domains of life usually use the mRNA codon AUG as the start codon.
Despite AUG being the most common start codon sequence, very few proteins have methionine as the first amino acid. Why is this the case?
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Textbook Question
Answer the following questions about the accompanying diagram.
Which end of the DNA is closest to A?
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Textbook Question
Answer the following questions about the accompanying diagram.
What structure is closest to B?
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Textbook Question
Answer the following questions about the accompanying diagram.
What is the name of the molecule closest to C?
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