Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 13, Problem 26CONQ
Summary Introduction
To review:
The selection of start codons by eukaryotic ribosomes and the sequence in eukaryotic mRNA (messenger ribonucleic acid) that provides an optimal context for a start codon.
Introduction:
Translation is completed in three steps; initiation, elongation, and termination. At the time of initiation, a small ribosomal unit binds to the mRNA sequence. The amino acid is brought by charged tRNAs(transfer RNA) that are connected to each other, in order to form a polypeptide. Then, a stop codon in the mRNA terminates the process.
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How does a eukaryotic ribosome select its start codon? Describe the sequences in eukaryotic mRNA that provide an optimal context for a start codon.
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Chapter 13 Solutions
Genetics: Analysis and Principles
Ch. 13.1 - Prob. 1COMQCh. 13.1 - 2. The reason why Beadle and Tatum observed four...Ch. 13.2 - What is the genetic code? a. The relationship...Ch. 13.2 - Prob. 2COMQCh. 13.2 - The fourth codon in an mRNA sequence is GGG, which...Ch. 13.2 - Prob. 4COMQCh. 13.3 - Prob. 2COMQCh. 13.4 - Prob. 1COMQCh. 13.4 - 2. The anticodon of a tRNA is located in the
a....Ch. 13.4 - An enzyme known as _______attaches an amino acid...
Ch. 13.5 - Each ribosomal subunit is composed of a. multiple...Ch. 13.5 - Prob. 2COMQCh. 13.6 - 1. During the initiation stage of translation in...Ch. 13.6 - The Kozak rules determine a. the choice of the...Ch. 13.6 - During the peptidyl transfer reaction, the...Ch. 13.6 - A release factor is referred to as a molecular...Ch. 13 - Prob. 1CONQCh. 13 - What does it mean when we say that the genetic...Ch. 13 - According to the adaptor hypothesis, is each of...Ch. 13 - Prob. 4CONQCh. 13 - Prob. 5CONQCh. 13 - 6. The wobble rules for tRNA-mRNA pairing are...Ch. 13 - Prob. 7CONQCh. 13 - Prob. 8CONQCh. 13 - Prob. 9CONQCh. 13 - If a tRNA has an anticodon sequence 3CCI5, what...Ch. 13 - Describe the anticodon of a single tRNA that could...Ch. 13 - Prob. 12CONQCh. 13 - Prob. 13CONQCh. 13 - 14. What is the role of aminoacyl-tRNA synthetase?...Ch. 13 - Prob. 15CONQCh. 13 - 16. Discuss the significance of modified bases...Ch. 13 - How and when does formylmethionine become attached...Ch. 13 - Prob. 18CONQCh. 13 - Prob. 19CONQCh. 13 - Prob. 20CONQCh. 13 - The term subunit can be used in a variety of ways....Ch. 13 - 22. Do the following events during bacterial...Ch. 13 - 23. What are the three stages of translation?...Ch. 13 - Prob. 24CONQCh. 13 - 25. For each of the following initiation factors,...Ch. 13 - Prob. 26CONQCh. 13 - 27. For each of the following sequences, rank them...Ch. 13 - Prob. 28CONQCh. 13 - Prob. 29CONQCh. 13 - Prob. 30CONQCh. 13 - Prob. 31CONQCh. 13 - In which of the ribosomal sites, the A site, P...Ch. 13 - Prob. 33CONQCh. 13 - Prob. 34CONQCh. 13 - Prob. 35CONQCh. 13 - Prob. 36CONQCh. 13 - Prob. 37CONQCh. 13 - 1. In the experiment of Figure 13.7, what would be...Ch. 13 - 2. Polypeptides can be translated in vitro. Would...Ch. 13 - Discuss how the elucidation of the structure of...Ch. 13 - Describe the structure of a polysome, which is...Ch. 13 - Prob. 5EQCh. 13 - 6. The technique of Western blotting is described...Ch. 13 - The protein known as tyrosinase is needed to make...Ch. 13 - Prob. 8EQCh. 13 - Discuss why you think the ribosomes need to...Ch. 13 - 2. Discuss and make a list of the similarities...Ch. 13 - 3. Which events during translation involve...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- How does placement of a ribosome at the start codon differ in bacteria and eukaryotes? What role do the 59 cap and 39 poly-A tail play in this process in eukaryotes?arrow_forwardIf the mRNA transcribed for this gene will be translated into a functional protein, how many amino acids will be used to build the polypeptide chain? what is the amino acid coded by the 25th codon? what is the amino acid coded by the last codon?arrow_forwardWhat is the minimum number of tRNA molecules that a cell must contain in order to translate all 61 sense codons?arrow_forward
- How do the stop codons UAA, UAG, and UGA know to form? What if a protein stops synthesizing too early or too late?arrow_forwardOne of the codons in mRNA that specifies the amino acid phenylalanine is UUC. What is the anticodon on the tRNA that carries phenylalanine?arrow_forwardWhat is the DNA sequence that encodes the codon AAG, with 5’ and 3’ ends labeled?arrow_forward
- What is the last codon in this mRNA sequence? AUGCCAUGGarrow_forwardIn prokaryotic protein synthesis, formylmethionine (fmet) is the first amino acid incorporated, whereas (normal) methionine is incorporated in eukaryotes. The same codon (AUG) serves both. What prevents methionine from being inserted into the beginning and formylmethionine in the interior?arrow_forwardHow do eukaryotic cells ensure the start codon of the mRNA is positioned properly during translation initiation?arrow_forward
- How do bacteria ensure the start codon of the mRNA is positioned properly during translation initiation?arrow_forwardSuppose the codon sequence AUGACCCGGCUACUG has a single base pair mutation to AUGACCCGGUUACUG. If the old protein sequence was Met-Thr-Arg-Leu-Leu, what will be the new sequence encoded by the mutant gene?arrow_forward
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