Textbook Question
Which component is not directly involved in translation?
a. GTP
b. DNA
c. tRNA
d. ribosomes
1
views
Ch. 17 - Gene Expression: From Gene to Protein
Urry11th EditionCampbell BiologyISBN: 9789357423311
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch. 1 - Evolution, the Themes of Biology, and Scientific Inquiry8
- Ch. 2 - The Chemical Context of Life8
- Ch. 3 - Water and Life6
- Ch. 4 - Carbon and the Molecular Diversity of Life9
- Ch. 5 - The Structure and Function of Large Biological Molecules9
- Ch. 6 - A Tour of the Cell6
- Ch. 7 - Membrane Structure and Function6
- Ch. 8 - An Introduction to Metabolism6
- Ch. 9 - Cellular Respiration and Fermentation10
- Ch. 10 - Photosynthesis7
- Ch. 11 - Cell Communication7
- Ch. 12 - The Cell Cycle10
- Ch. 13 - Meiosis and Sexual Life Cycles10
- Ch. 14 - Mendel and the Gene Idea14
- Ch, 15 - The Chromosomal Basis of Inheritance7
- Ch. 16 - The Molecular Basis of Inheritance9
- Ch. 17 - Gene Expression: From Gene to Protein9
- Ch. 18 - Regulation of Gene Expression10
- Ch. 19 - Viruses6
- Ch. 20 - DNA Tools and Biotechnology8
- Ch. 21 - Genomes and Their Evolution8
- Ch. 22 - Descent with Modification: A Darwininan View of Life6
- Ch. 23 - The Evolution of Populations5
- Ch. 24 - The Origin of Species6
- Ch. 25 - The History of Life on Earth6
- Ch. 26 - Phylogeny and the Tree of Life7
- Ch. 27 - Bacteria and Archaea8
- Ch. 28 - Protists7
- Ch. 29 - Plant Diversity I: How Plants Colonized Land7
- Ch. 30 - Plant Diversity II: The Evolution of Seed Plants7
- Ch. 31 - Fungi5
- Ch. 32 - An Overview of Animal Diversity4
- Ch. 33 - An introduction to Invertebrates6
- Ch. 34 - The Origin and Evolution of Vertebrates7
- Ch. 35 - Vascular Plant Structure, Growth, and Development8
- Ch. 36 - Resource Acquisition and Transport in Vascular Plants8
- Ch. 37 - Soil and Plant Nutrition10
- Ch. 38 - Angiosperm Reproduction and Biotechnology8
- Ch. 39 - Plant Responses to Internal and External Signals8
- Ch. 40 - Basic Principles of Animal Form and Function8
- Ch. 41 - Animal Nutrition7
- Ch. 42 - Circulation and Gas Exchange7
- Ch. 43 - The Immune System6
- Ch. 44 - Osmoregulation and Excretion6
- Ch. 45 - Hormones and the Endocrine System8
- Ch. 46 - Animal Reproduction8
- Ch. 47 - Animal Development8
- Ch. 48 - Neurons, Synapses, and Signaling6
- Ch. 49 - Nervous Systems8
- Ch. 50 - Sensory and Motor Mechanisms5
- Ch. 51 Animal Behavior6
- Ch. 52 - An Introduction to Ecology and the Biosphere7
- Ch. 53 - Population Ecology10
- Ch. 54 - Community Ecology9
- Ch. 55 - Ecosystems and Restoration Ecology8
- Ch. 56 - Conservation Biology and Global Change6
Chapter 17, Problem 2
Which of the following is not true of a codon?
a. It may code for the same amino acid as another codon.
b. It never codes for more than one amino acid.
c. It extends from one end of a tRNA molecule.
d. It is the basic unit of the genetic code.
Verified step by step guidance1
Understand the definition of a codon: A codon is a sequence of three nucleotides on mRNA that corresponds to a specific amino acid or a stop signal during protein synthesis.
Review the concept of redundancy in the genetic code: Multiple codons can code for the same amino acid, which is known as redundancy or degeneracy of the genetic code.
Consider the specificity of codons: Each codon codes for only one amino acid or a stop signal, ensuring precise translation during protein synthesis.
Examine the role of tRNA: Codons do not extend from tRNA molecules; instead, anticodons on tRNA molecules pair with codons on mRNA during translation.
Identify the basic unit of the genetic code: Codons are indeed the basic units of the genetic code, as they determine the sequence of amino acids in a protein.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
57sWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Codon
A codon is a sequence of three nucleotides in mRNA that specifies a particular amino acid or a stop signal during protein synthesis. Codons are the basic units of the genetic code, and each corresponds to a specific amino acid or function in the translation process.
Recommended video:
Guided course
11:39
How to Use the Genetic Code
Genetic Code
The genetic code is a set of rules by which information encoded in genetic material (DNA or RNA sequences) is translated into proteins by living cells. It is universal among organisms and consists of 64 codons, where multiple codons can code for the same amino acid, a phenomenon known as redundancy.
Recommended video:
Guided course
01:28Genetic Code
tRNA and Anticodon
Transfer RNA (tRNA) is a type of RNA molecule that helps decode a messenger RNA (mRNA) sequence into a protein. Each tRNA has an anticodon region that is complementary to a codon on the mRNA, allowing it to bring the correct amino acid to the ribosome during translation. Codons do not extend from tRNA; rather, anticodons do.
Recommended video:
Guided course
06:16Ribosomal tRNA Binding Sites
Related Practice
Textbook Question
In eukaryotic cells, transcription cannot begin until
a. The two DNA strands have completely separated and exposed the promoter.
b. Several transcription factors have bound to the promoter.
c. The 5′ caps are removed from the mRNA.
d. The DNA introns are removed from the template.
1
views
Textbook Question
Which of the following is not true of RNA processing?
a. Exons are cut out before mRNA leaves the nucleus.
b. Nucleotides may be added at both ends of the RNA.
c. Ribozymes may function in RNA splicing.
d. RNA splicing can be catalyzed by spliceosomes.
Textbook Question
The anticodon of a particular tRNA molecule is
a. Complementary to the corresponding mRNA codon
b. Complementary to the corresponding triplet in rRNA
c. The part of tRNA that bonds to a specific amino acid
d. Catalytic, making the tRNA a ribozyme