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 13d
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
Guida verificata passo dopo passo1
Understand the concept of wobble: The wobble hypothesis explains that the third base of a codon (on mRNA) and the first base of the anticodon (on tRNA) can form non-standard base pairing, allowing a single tRNA to recognize multiple codons.
Identify the codons for lysine: Lysine is encoded by two codons, AAA and AAG, according to the genetic code.
Determine the wobble base pairing rules: The third position of the codon (wobble position) allows for flexibility in pairing. For example, the anticodon base 'U' can pair with both 'A' and 'G' in the wobble position.
Analyze the anticodon requirements: A single tRNA with an anticodon complementary to UUU (which pairs with AAA and AAG) can recognize both codons for lysine due to wobble pairing.
Conclude the minimal number of tRNAs: Based on the wobble hypothesis, only one tRNA molecule is necessary to recognize both codons for lysine.
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Wobble Hypothesis
The wobble hypothesis explains how the third position of a codon can tolerate mismatches between the codon in mRNA and the corresponding anticodon in tRNA. This flexibility allows a single tRNA to pair with multiple codons that code for the same amino acid, thereby reducing the total number of tRNA molecules required for protein synthesis.
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Percorso guidato
03:13
Translation:Wobble Hypothesis
tRNA and Codons
Transfer RNA (tRNA) molecules are responsible for bringing amino acids to the ribosome during protein synthesis. Each tRNA has an anticodon that pairs with a specific codon on the mRNA. Understanding the relationship between tRNA and codons is crucial for determining how many tRNA molecules are needed to recognize all codons for a particular amino acid.
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Amino Acid Codons
Amino acids are encoded by specific sequences of three nucleotides known as codons. For lysine, there are two codons: AAA and AAG. Recognizing that multiple codons can correspond to the same amino acid is essential for calculating the minimal number of tRNA molecules required to translate the genetic code accurately.
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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?
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
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
800
views
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
views
Domanda del libro di testo
The three major forms of RNA (mRNA, tRNA, and rRNA) interact during translation.
Which of the three types of RNA might you expect to be the least stable? Why?
1014
views