교과서 질문
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
9장, 문제 15c
The three major forms of RNA (mRNA, tRNA, and rRNA) interact during translation.
Which form of RNA is least stable in eukaryotes? Why is this form least stable?
검증된 단계별 안내1
Understand the three major forms of RNA: mRNA (messenger RNA), tRNA (transfer RNA), and rRNA (ribosomal RNA). Each plays a distinct role in translation. mRNA carries the genetic code from DNA to the ribosome, tRNA brings amino acids to the ribosome, and rRNA forms the structural and functional components of the ribosome.
Recognize that stability in RNA molecules is influenced by their structure and function. rRNA and tRNA are highly structured and often form stable secondary and tertiary structures, which protect them from degradation.
Note that mRNA is the least stable form of RNA in eukaryotes. This is because mRNA is designed to be transient, allowing for the regulation of gene expression. Once its message is translated into protein, it is no longer needed and is rapidly degraded.
Understand the mechanisms of mRNA degradation. In eukaryotes, mRNA is degraded through processes such as deadenylation (removal of the poly-A tail), decapping (removal of the 5' cap), and exonucleolytic decay. These processes ensure that mRNA does not persist longer than necessary.
Conclude that the least stability of mRNA is an evolutionary adaptation to allow cells to quickly respond to changes in their environment by regulating protein synthesis efficiently.
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2m주요 개념
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Types of RNA
There are three major types of RNA involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). mRNA carries the genetic information from DNA to the ribosome, tRNA transports amino acids to the ribosome for protein assembly, and rRNA is a structural component of ribosomes, facilitating the translation process.
추천 영상:
가이드 코스
05:43
RNA
Stability of RNA
RNA stability refers to the lifespan of RNA molecules within a cell. mRNA is generally less stable than rRNA and tRNA due to its role in conveying transient genetic information, which requires it to be rapidly synthesized and degraded. This instability allows for precise regulation of gene expression in response to cellular needs.
추천 영상:
가이드 코스
05:43RNA
Eukaryotic mRNA Processing
In eukaryotes, mRNA undergoes extensive processing, including capping, polyadenylation, and splicing, before it can be translated. These modifications enhance mRNA stability and translation efficiency, but the inherent design of mRNA, which is meant to be temporary, contributes to its overall lower stability compared to tRNA and rRNA, which have more stable structures.
추천 영상:
가이드 코스
08:39mRNA Processing
관련 실천
교과서 질문
The three major forms of RNA (mRNA, tRNA, and rRNA) interact during translation.
Compared to the average stability of mRNA in E. coli, is mRNA in a typical human cell more stable or less stable? Why?
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교과서 질문
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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교과서 질문
The accompanying figure contains sufficient information to fill in every row. Use the information provided to complete the figure.
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교과서 질문
The line below represents a mature eukaryotic mRNA. The accompanying list contains many sequences or structures that are part of eukaryotic mRNA. A few of the items in the list, however, are not found in eukaryotic mRNA. As accurately as you can, show the location, on the line, of the sequences or structures that belong in eukaryotic mRNA; then, separately, list the items that are not part of eukaryotic mRNA.
5′ ____________________________ 3′
a. stop codon
b. poly-A tail
c. intron
d. 3' UTR
e. promoter
f. start codon
g. AAUAAA
h. 5' UTR
i. 5' cap
j. termination sequence
852
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교과서 질문
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