WORLD OF CELL+MASTERING ACCESS >CUSTOM
9th Edition
ISBN: 9781323445044
Author: Hardin
Publisher: PEARSON C
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Chapter 19, Problem 19.2CC
Kanamycin is an antibiotic that binds to bacterial ribosomes and allows diverse tRNA with any anticodons to bind at the A site. What effect do you think kanamycin would have on bacterial translation, and why?
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Methionine is used as the first amino acid for a particular polypeptide, but it is removed during the translation process in this case. After removal of the methionine, the final polypeptide is 246 amino acids in length. How many nucleotides were used to provide the genetic coding for this particular peptide chain? Explain your answer and be sure to account for the initiation and termination of the translation process.
Many antibiotics are effective as drugs to fight off bacterial infections because they inhibit protein synthesis in bacterial cells. Using the information provided in the following table that highlights several antibiotics and their mode of action, discuss which phase of translation is inhibited: initiation, elongation, or termination. What other components of the translational machinery could be targeted to inhibit bacterial protein synthesis? Antibiotic Action 1. Streptomycin Binds to 30S ribosomal subunit 2. Chloramphenicol Inhibits peptidyl transferase of 70S ribosome 3. Tetracycline Inhibits binding of charged tRNA to the A site of the ribosome 4. Erythromycin Binds to free 50S particle and prevents formation of 70S ribosome 5. Kasugamycin Inhibits binding of tRNAfMet 6. Thiostrepton Prevents translocation by inhibiting EF-G
For each of the following initiation factors, how would eukaryoticinitiation of translation be affected if it were missing?A. eIF2B. eIF4C. eIF5
Chapter 19 Solutions
WORLD OF CELL+MASTERING ACCESS >CUSTOM
Ch. 19 - Suppose a tRNA has the anticodon 3-CGU-5. What two...Ch. 19 - Kanamycin is an antibiotic that binds to bacterial...Ch. 19 - You are working in a lab to identify new alleles...Ch. 19 - Suppose you are using GFP fusion proteins to study...Ch. 19 - Enzymes can undergo allosteric regulation or...Ch. 19 - Suppose you use molecular biology techniques to...Ch. 19 - Prob. 19.1PSCh. 19 - Tracking a Series of Mutations. The following...Ch. 19 - Prob. 19.3PSCh. 19 - Prob. 19.4PS
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- Researchers are studying the mechanism of the antibiotic chloramphenicol. They know that it prevents the formation of peptide bonds during translation. A model of the translation process is shown in the diagram. Which of the following describes where in the model chloramphenicol acts to interfere with the production of proteins from DNA? during initiation during elongation during termination during protein releasearrow_forwardFor each of the following initiation factors, how would eukaryotic initiation of translation be affected if it were missing? A. eIF 2 B. eIF4 C. eIF5arrow_forwardThe template strand of a double helical segment of DNA consists of the following sequence: 5’-GTAGCCTTAAGCGATCACCGTCCGTATTACTAGTGGCCAGACTCTTTTCACTCTCATGTATAGTTG-3’ Following translation process, what is the amino acid sequence that will be coded for? (show your answer using ONE-letter amino acid code starting from N-terminus to C-terminus)arrow_forward
- Which of the following best describes a sequence of events that happens during the elongation phase of translation? Group of answer choices A charged tRNA enters the P site of a ribosome; a tRNA bound to a peptide moves to the A site; an tRNA bound to a peptide exits the E site. None of these is an accurate description A charged tRNA enters the A site of a ribosome; a tRNA bound to a peptide moves to the P site; an uncharged tRNA exits the E site. An uncharged tRNA enters the A site of a ribosome; a tRNA bound to a peptide moves to the P site; a charged tRNA exits the E site. A charged tRNA enters the A site of a ribosome; a tRNA bound to a peptide moves to the E site; an tRNA bound to a peptide exits the A site.arrow_forwardThe template strand of a double helical segment of DNA consists of the following sequence: 5’-GTAGCCTTAAGCGATCACCGTCCGTATTACTAGTGGCCAGACTCTTTTCACTCTCATGTATAGTTG-3’ Following translation process, what is the amino acid sequence that will be coded for? (show your answer using THREE-letter amino acid code starting from N-terminus to C-terminus)arrow_forwardResearchers are studying the mechanism of the antibiotic chloramphenicol. They know that it prevents the formation of peptide bonds during translation. A model of the translation process is shown in the diagram. Which of the following describes where in the model chloramphenicol acts to interfere with the production of proteins from DNA? A - during initiationB - during elongationC = during terminationD = during protein releasearrow_forward
- For translation, identify two things that happen during each step - initiation, elongation and termination.arrow_forwardIf you had a polyC RNA and put it in a reaction with ribosomes and tRNAs (and all of the other materials you needed for translation), you would generate a polymer ofarrow_forwardThe earliest work on the genetic code established UUU, CCC, and AAA as the codons for Phe, Pro, and Lys, respectively. Can you think of a reason why polyG was not used as a translation template in these experiments?arrow_forward
- Which of the following statements about translation is false? In eukaryotes, the 5' cap and the 3' poly(A) tail are involved in translation initiation. Peptidyl-transferase activity during translation is the property of a ribozyme. A base at the first position of an anticodon on the tRNA would pair with a base at the third position of the mRNA. The growing peptide chain is transferred from the tRNA in the P site to the tRNA in the A site. Ribosomes move along an mRNA in the 3’ → 5' direction.arrow_forwardWhy do bacteria use formylated methionine in the initiator tRNA, while eukaryotes do not?arrow_forwardA synthetic mRNA added to a cell-free protein-synthesizing system produces a peptide with the following amino acid sequence: Met-ProIle-Ser-Ala. What would be the effect on translation if the following component were omitted from the cell-free protein-synthesizing system? What, if any, type of protein would be produced? Explain your reasoning. Q. ATParrow_forward
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