Domanda del libro di testo
The three major forms of RNA (mRNA, tRNA, and rRNA) interact during translation.
Describe the role each form of RNA performs during translation.
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Ch. 9 - The Molecular Biology of Translation
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
Capitolo 9, Problema 13c
Third-base wobble allows some tRNAs to recognize more than one mRNA codon. Based on this chapter's discussion of wobble, what is the minimal number of tRNA molecules necessary to recognize the following amino acids?
Isoleucine
Guida verificata passo dopo passo1
Understand the concept of wobble: Wobble refers to the flexibility in base pairing at the third position of the codon, allowing some tRNAs to pair with multiple codons. This reduces the number of tRNAs required to recognize all codons for a given amino acid.
Identify the codons for isoleucine: Isoleucine is encoded by three codons in the genetic code: AUU, AUC, and AUA.
Analyze the wobble rules: The third position of the codon can pair with multiple bases due to wobble. For example, the anticodon of a tRNA may have inosine (I), which can pair with U, C, or A in the third position of the codon.
Determine the minimal number of tRNAs: Based on wobble pairing, a single tRNA with an anticodon containing inosine at the wobble position can recognize AUU, AUC, and AUA. However, some organisms may use more than one tRNA for isoleucine depending on their genetic makeup.
Conclude the reasoning: The minimal number of tRNA molecules necessary to recognize the codons for isoleucine is one, assuming wobble pairing is utilized effectively.
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tRNA and Codons
Transfer RNA (tRNA) is a type of RNA molecule that helps decode mRNA sequences into proteins. Each tRNA molecule carries a specific amino acid and has an anticodon that pairs with a corresponding mRNA codon. Understanding the relationship between tRNA and codons is essential for determining how many tRNA molecules are needed to recognize various amino acids.
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Wobble Hypothesis
The wobble hypothesis explains how the third position of a codon can tolerate certain mismatches between the codon and anticodon. This flexibility allows a single tRNA to pair with multiple codons that code for the same amino acid, reducing the total number of tRNA molecules required for protein synthesis. Recognizing this concept is crucial for answering questions about the minimal number of tRNAs needed.
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Percorso guidato
03:13
Translation:Wobble Hypothesis
Amino Acid Codons
Amino acids are encoded by specific sequences of three nucleotides known as codons. For isoleucine, there are three codons (AUU, AUC, AUA) that specify this amino acid. Understanding the codons associated with isoleucine is necessary to determine how many distinct tRNA molecules are required to recognize all codons for this amino acid, especially considering the wobble effect.
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Pratica correlata
Domanda del libro di testo
Third-base wobble allows some tRNAs to recognize more than one mRNA codon. Based on this chapter's discussion of wobble, what is the minimal number of tRNA molecules necessary to recognize the following amino acids?
Lysine
718
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Domanda del libro di testo
Third-base wobble allows some tRNAs to recognize more than one mRNA codon. Based on this chapter's discussion of wobble, what is the minimal number of tRNA molecules necessary to recognize the following amino acids?
Arginine
592
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Domanda del libro di testo
The genetic code contains 61 codons to specify the 20 common amino acids. Many organisms carry fewer than 61 different tRNA genes in their genomes. These genomes take advantage of isoaccepting tRNAs and the rules governing third-base wobble to encode fewer than 61 tRNA genes. Use these rules to calculate the minimal number of tRNA genes required to specify all 20 of the common amino acids.
744
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Domanda del libro di testo
The diagram of a eukaryotic ribosome shown below contains several errors.
Redraw the diagram, and correct each error using the mRNA sequence shown.
464
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Domanda del libro di testo
Third-base wobble allows some tRNAs to recognize more than one mRNA codon. Based on this chapter's discussion of wobble, what is the minimal number of tRNA molecules necessary to recognize the following amino acids?
Leucine
1255
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