교과서 질문
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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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
9장, 문제 36
The six nucleotides preceding the start codon and the first nucleotide after the start codon in eukaryotes exhibit strong sequence conservation as determined by the percentages of nucleotides in the to positions and the position (see Problem 34). Use the data given in the table for Problem 35 to determine the seven nucleotides that most commonly surround the start in vertebrates.
검증된 단계별 안내1
Identify the start codon in eukaryotes, which is typically 'AUG'.
Examine the table provided in Problem 35 to find the nucleotide frequencies for the six positions preceding the start codon and the first position after it.
For each of the six positions before the start codon, select the nucleotide with the highest percentage from the table.
For the position immediately following the start codon, select the nucleotide with the highest percentage from the table.
Combine the selected nucleotides to form the sequence of seven nucleotides surrounding the start codon.
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주요 개념
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Start Codon
The start codon is a specific sequence of nucleotides in mRNA that signals the beginning of translation. In eukaryotes, the most common start codon is AUG, which codes for the amino acid methionine. Understanding the location and function of the start codon is crucial for analyzing gene expression and protein synthesis.
추천 영상:
가이드 코스
07:58
Translation initiation
Nucleotide Sequence Conservation
Nucleotide sequence conservation refers to the preservation of specific sequences of nucleotides across different species or within a species over time. High conservation indicates that these sequences are functionally important, often involved in critical biological processes such as initiation of translation. Analyzing conserved sequences can provide insights into evolutionary relationships and gene function.
추천 영상:
가이드 코스
08:55Sequencing Overview
Vertebrate Genomic Data
Vertebrate genomic data encompasses the genetic information derived from vertebrate species, which can be analyzed to identify common patterns in nucleotide sequences surrounding start codons. This data is essential for understanding evolutionary biology and the mechanisms of gene regulation. By examining this data, researchers can determine which nucleotides are most frequently found in specific positions relative to the start codon.
추천 영상:
가이드 코스
02:48Genomics Overview
관련 실천
교과서 질문
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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교과서 질문
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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교과서 질문
Table D lists α-globin and β-globin gene sequences for the 11 or 12 nucleotides preceding the start codon and the first nucleotide following the start codon (see Problem 34). The data are for 16 vertebrate globin genes reported by Kozak (1987). The sequences are written from -12 to +4 with the start codon sequence in capital letters. Use the data in this table to:
Compare the consensus sequence for these globin genes to the consensus sequence derived from the larger study of 699 vertebrate genes in Problem 34.
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교과서 질문
Table C contains DNA-sequence information compiled by Marilyn Kozak (1987). The data consist of the percentage of A, C, G, and T at each position among the 12 nucleotides preceding the start codon in 699 genes from various vertebrate species and at the first nucleotide after the start codon. (The start codon occupies positions +1 to +3 and the first nucleotide immediately after the start codon occupies position +4) Use the data to determine the consensus sequence for the 13 nucleotides ( -12 to -1 and +4) surrounding the start codon in vertebrate genes.
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교과서 질문
Table D lists α-globin and β-globin gene sequences for the 11 or 12 nucleotides preceding the start codon and the first nucleotide following the start codon (see Problem 34). The data are for 16 vertebrate globin genes reported by Kozak (1987). The sequences are written from -12 to +4 with the start codon sequence in capital letters. Use the data in this table to:
Determine the consensus sequence for the 16 selected α-globin and β-globin genes.
549
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