Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 17, Problem 3SYK
What is the genetic code? Explain redundancy and the wobble phenomenon. What is the significance of the fact that the genetic code is nearly universal?
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Chapter 17 Solutions
Study Guide for Campbell Biology
Ch. 17 - a. In what three ways does RNA differ from DNA? b....Ch. 17 - Prob. 2IQCh. 17 - Prob. 3IQCh. 17 - How does the mRNA that leaves the nucleus differ...Ch. 17 - Prob. 5IQCh. 17 - In the following diagrams of polypeptide...Ch. 17 - What determines if a ribosome becomes bound to the...Ch. 17 - Define the following terms and explain what type...Ch. 17 - You have been introduced to several types of RNA...Ch. 17 - Prob. 2SYK
Ch. 17 - What is the genetic code? Explain redundancy and...Ch. 17 - Prepare a concept map showing the types and...Ch. 17 - Prob. 1TYKCh. 17 - Transcription involves the transfer of information...Ch. 17 - Prob. 3TYKCh. 17 - Prob. 4TYKCh. 17 - Which of the following is a statement of the...Ch. 17 - Prob. 6TYKCh. 17 - Prob. 7TYKCh. 17 - Prob. 8TYKCh. 17 - Which of the following is true of RNA processing?...Ch. 17 - Prob. 10TYKCh. 17 - Prob. 11TYKCh. 17 - Prob. 12TYKCh. 17 - Prob. 13TYKCh. 17 - Prob. 14TYKCh. 17 - What type of bonding is responsible for...Ch. 17 - Prob. 16TYKCh. 17 - Prob. 17TYKCh. 17 - Prob. 18TYKCh. 17 - Prob. 19TYKCh. 17 - Prob. 20TYKCh. 17 - Prob. 21TYKCh. 17 - Prob. 22TYKCh. 17 - Prob. 23TYKCh. 17 - Prob. 24TYKCh. 17 - Prob. 25TYKCh. 17 - Prob. 26TYKCh. 17 - Prob. 27TYKCh. 17 - Prob. 28TYK
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- The genetic code is thought to have evolved to maximize genetic stability by minimizing the effect on protein function of most substitution mutations (single-base changes). We will use the six arginine codons to test this idea. Consider all of the substitutions that could affect all of the six arginine codons.(a) How many total mutations are possible?(b) How many of these mutations are “silent,” in the sense that the mutantcodon is changed to another Arg codon?(c) How many of these mutations are conservative, in the sense that an Argcodon is changed to a functionally similar Lys codon?arrow_forwardWhy can the genetic code be qualified as a “degenerate code”?arrow_forwardWhat is meant by the universality of the genetic code?arrow_forward
- Why may tRNA be considered the “interpreter” of the genetic code?arrow_forwardWhat is the “second genetic code”?arrow_forwardA gene contains 141 codons. How many nucleotides are present in the gene’s coding sequence? How many amino acids are expected to be present in the polypeptide encoded by this gene?arrow_forward
- Explain why there is redundancy in the genetic code but no ambiguity.arrow_forwardList a few exceptions to the genetic code.arrow_forwardThe following pattern has been observed in the genetic code. For many codons, the first base specifies a biosynthetic precursor: U = pyruvate, C = α-ketoglutarate, A = oxaloacetate, G = any of a number of simple precursors. The second base of the codon tends to be associated with water solubility: water-soluble amino acids have a G, A, or C as the middle position, whereas five of seven of the most hydrophobic amino acids have U as the middle base. The third base in a codon is often information free; that is, many of the codons for the same amino acid differ only with the third base. Review amino acid biosynthesis and determine which amino acids obey these rules. What are the exceptions?arrow_forward
- what is Conservation of the genetic code?arrow_forwardAccording to wobble rules, what codons should be recognized by the following anticodons? What amino acid residues do these correspond to?(a) 5′ ¬ICC ¬ 3′ (b) 5′ ¬GCU ¬3′arrow_forwardhow is The Genetic Code Is Almost,but Not Quite, Universal?arrow_forward
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