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Textbook Question
Identify the amino acid carried by tRNAs with the following anticodon sequences.
5′-AAA-3′
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 7e
Identify the amino acid carried by tRNAs with the following anticodon sequences.
5′-GAU-3′
Verified step by step guidance1
Determine the codon that pairs with the given anticodon. Remember that the anticodon on the tRNA is complementary and antiparallel to the mRNA codon. For the anticodon 5′-GAU-3′, the corresponding mRNA codon will be 5′-AUC-3′.
Identify the directionality of the codon and ensure it is read in the 5′ to 3′ direction, which is the standard for mRNA sequences.
Use the genetic code table to find the amino acid corresponding to the mRNA codon 5′-AUC-3′. Look up the codon in the table to determine the amino acid it specifies.
Recall that the genetic code is universal and redundant, meaning multiple codons can code for the same amino acid. Verify the amino acid associated with the codon 5′-AUC-3′.
Conclude that the tRNA with the anticodon 5′-GAU-3′ carries the amino acid specified by the mRNA codon 5′-AUC-3′, based on the genetic code table.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
tRNA and Anticodons
Transfer RNA (tRNA) is a type of RNA molecule that helps decode a messenger RNA (mRNA) sequence into a protein. Each tRNA has a specific anticodon sequence that is complementary to a corresponding codon on the mRNA. This pairing ensures that the correct amino acid is added to the growing polypeptide chain during translation.
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Codon-Amino Acid Relationship
The genetic code consists of codons, which are sequences of three nucleotides in mRNA that correspond to specific amino acids. Each codon specifies one amino acid, and the relationship between codons and amino acids is universal across most organisms. Understanding this relationship is crucial for determining which amino acid is associated with a given tRNA anticodon.
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Amino Acid for GAU Anticodon
The anticodon sequence 5′-GAU-3′ pairs with the mRNA codon 5′-AUC-3′. According to the genetic code, the codon AUC corresponds to the amino acid isoleucine. Therefore, tRNAs with the GAU anticodon carry isoleucine, which is essential for protein synthesis.
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Related Practice
Textbook Question
Identify the amino acid carried by tRNAs with the following anticodon sequences.
5′-CUC-3′
Textbook Question
Identify the amino acid carried by tRNAs with the following anticodon sequences.
5′-AUG-3′
Textbook Question
For each of the anticodon sequences given in the previous problem, identify the other codon sequence to which it could potentially pair using third base wobble.
Textbook Question
What is the role of codons UAA, UGA, and UAG in translation? What events occur when one of these codons appears at the A site of the ribosome?
Textbook Question
If a man and a woman are each heterozygous carriers of a mutation causing a disease on the RUSP list, what do you think are the three or four most important factors they should consider in their decision making about having children?