Concepts of Genetics (11th Edition)
11th Edition
ISBN: 9780321948915
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 14, Problem 24PDQ
Several amino acid substitutions in the α and β chains of human hemoglobin are shown in the following table.
Using the code table (Figure 13.7), determine how many of them can occur as a result of a single-
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Shown in the following table are several amino acid substitutionsin the a and b chains of human hemoglobin. determine how many of them can occur as a result of a single nucleotide change.
Provide the 20 amino acids in this format:
Sketch the titration curve for the amino acid alanine with pka1 = 2.34 and pka2 = 9.69.
Chapter 14 Solutions
Concepts of Genetics (11th Edition)
Ch. 14 - Prob. 1NSTCh. 14 - A series of mutations in the bacterium Salmonella...Ch. 14 - HbS results from the substitution of valine for...Ch. 14 - Prob. 1CSCh. 14 - Prob. 2CSCh. 14 - Prob. 3CSCh. 14 - HOW DO WE KNOW?
In this chapter, we focused on the...Ch. 14 - CONCEPT QUESTION Review the Chapter Concepts list...Ch. 14 - Contrast the roles of tRNA and mRNA during...Ch. 14 - Francis Crick proposed the adaptor hypothesis for...
Ch. 14 - During translation, what molecule bears the codon?...Ch. 14 - The chain of eukaryotic hemoglobin is composed of...Ch. 14 - Assuming that each nucleotide in an mRNA is 0.34...Ch. 14 - Summarize the steps involved in charging tRNAs...Ch. 14 - To carry out its role, each transfer RNA requires...Ch. 14 - What are isoaccepting tRNAs? Assuming that there...Ch. 14 - Discuss the potential difficulties of designing a...Ch. 14 - Prob. 12PDQCh. 14 - Prob. 13PDQCh. 14 - Prob. 14PDQCh. 14 - The synthesis of flower pigments is known to be...Ch. 14 - The study of biochemical mutants in organisms such...Ch. 14 - Explain why the one-gene: one-enzyme concept is...Ch. 14 - Why is an alteration of electrophoretic mobility...Ch. 14 - Prob. 19PDQCh. 14 - Prob. 20PDQCh. 14 - Prob. 21PDQCh. 14 - Prob. 22PDQCh. 14 - Prob. 23PDQCh. 14 - Several amino acid substitutions in the and ...Ch. 14 - Prob. 25PDQCh. 14 - Prob. 26PDQCh. 14 - Prob. 27PDQCh. 14 - Define and compare the four levels of protein...Ch. 14 - Prob. 29PDQCh. 14 - How does an enzyme function? Why are enzymes...Ch. 14 - Prob. 31PDQCh. 14 - Three independently assorting genes (A, B, and C)...Ch. 14 - How would the results vary in cross (a) of Problem...Ch. 14 - Deep in a previously unexplored South American...Ch. 14 - Prob. 35ESPCh. 14 - The flow of genetic information from DNA to...Ch. 14 - Prob. 38ESPCh. 14 - Knowing the quaternary structure of proteins,...
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- When the amino acid sequences of insulin isolated from different organisms were determined, differences were noted. For example, alanine was substituted for threonine, serine for glycine, and valine for isoleucine at corresponding positions in the protein. List the single-base changes that could occur in codons of the genetic code to produce these amino acid changes.arrow_forwardWhen the amino acid sequences of insulin isolated from differentorganisms were determined, some differences were noted.For example, alanine was substituted for threonine, serine wassubstituted for glycine, and valine was substituted for isoleucineat corresponding positions in the protein. List the single-basechanges that could occur in triplets to produce these amino acidchanges.arrow_forwardThe bacterially produced antibiotic gramicidin A forms channels in cell membranes that allow the free diff usion of Na+ and K+ ions, thereby killing the cell. This peptide consists of a sequence of Dand L-amino acids. The sequence of a segment of fi ve amino acids in gramicidin A is R-Gly-L-Ala-D-Leu-L-Ala-D-Val-R′. Complete the Fischer projection below by adding the correct group to each vertical bond.arrow_forward
- Indicate all the possible sequences for a tripeptide containing alanine, glutamine, and methionine; use the standard abbreviation for each amino acid (Ala, Gln, Met).arrow_forwardThere are a total of six different amino acid sequences for a tripeptide containing one molecule each of serine, valine, and glycine. Using three-letter abbreviations for the amino acids, draw the six possible sequences of amino acids.arrow_forwardLactose permease, a protein of E. coli, is composed of a single polypeptide that is 417 amino acids in length. By convention, the amino acids within a polypeptide are numbered from the aminoterminus to the carboxyl-terminus. Are the following questions about lactose permease true or false? A. Because the 64th amino acid is glycine and the 68th amino acid is aspartic acid, the codon for glycine, 64, is closer to the 3′ end of the mRNA than the codon for aspartic acid, 68. B. The mRNA that encodes lactose permease must be greater than 1241 nucleotides in length.arrow_forward
- Which is the most deleterious type of amino acid substitution? Explain.arrow_forwardYou are studying the toxic protein called ectatomin, a major component of ant venom (specifically from the species Ectatomma tuberculatum), that embeds into cell membranes and creates pores that cause cells to lyse. Ectatomin is a small dimer, meaning the protein is comprised of two polypeptides; the sequences of the two polypeptides are given in the table with single-letter abbreviations. polypeptide sequences of ectatomin monomers polypeptide protein sequence polypeptide 1 GVIPKKIWETVCPTVEPWAKKCSGDIATYIKRECGKL polypeptide 2 WSTIVKLTICPTLKSMAKKCEGSIATMIKKKCDK You could use absorbance at 280?? or colorimetric assays like the Bradford assay or bicinchoninic acid assay (BCA) assay to quantify the amount of ectatomin you have for your experiment. Why might you choose to use a colorimetric method instead of absorbance at 280??? Select the best answer. Measuring absorbance at higher wavelengths, like 595?? or 562??, is more accurate than measuring absorbance at…arrow_forwardA) Draw the "standard" base pairs (A:T and G:C) but instead of using the most common form of each base, use the uncommon tautomer form of each base (i.e. imino A, imino C, enol G, enol T). Clearly indicate hydrogen bonds (an arrow from donor to acceptor will suffice). Be sure to include the “R” representing the pentose. B) The G:U "wobble" base pair can be formed between the most common tautomer forms of G & U. Another base pair with the same geometry/pairing/orientation can be formed between G & T. Can you create a "wobble" base pair between the uncommon enol tautomer forms of G & T? Like the "wobble" G:U base pair in the Lecture 1 slides, this enol-based "wobble" G:T base pair must have at least two hydrogen bonds. If possible, draw such a base pair, and note any important differences from the non-enol G:U/T wobble. If it is not possible to draw such a base pair, explain why.arrow_forward
- For the m-RNA nucleotide codons given below, what is the corresponding sequence of amino acids? AUG UGU AUA UAU GUA AUC ACC UUC UAU GUA ACA UUU UGG AAC AGC UGC CAU GUA UAC CAG AAA CUU GCA GAG CUG GCU UUG AUA UGA The α-helices are known to contain primarily the amino acids methionine, alanine, leucine, glutamate, and lysine, while β-pleated sheets are known to primarily contain the amino acids tryptophan, tyrosine, phenylalanine, isoleucine, valine, and threonine. Which one of these two types of secondary protein structure is present with this amino acid sequence?arrow_forwardThe enzyme creatine kinase catalyzes the ATP-dependent phosphorylation of creatine. Propose a mechanism for the reaction described using the curved arrow convention. Show the complete structure of the nucleotide.arrow_forwardWhat is the expected molecular weight of the protein encoded by the sequence provided here: ATGGCGCACGCTGGGAGAACAGGGTACGATAACCGGGAGATAGTGATGAAGTACATCCATTATAAGCTGTCGCAGAGGGGCTACGAGTGGGATGCGGGAGATGTGGGCGCCGCGCCCCCGGGGGCCGCCCCCGCACCGGGCATCTTCTCCTCCCAGCCCGGGCACACGCCCCATCCAGCCGCATCCCGGGACCCGGTCGCCAGGACCTCGCCGCTGCAGACCCCGGCTGCCCCCGGCGCCGCCGCGGGGCCTGCGCTCAGCCCGGTGCCACCTGTGGTCCACCTGACCCTCCGCCAGGCCGGCGACGACTTCTCCCGCCGCTACCGCCGCGACTTCGCCGAGATGTCCAGCCAGCTGCACCTGACGCCCTTCACCGCGCGGGGACGCTTTGCCACGGTGGTGGAGGAGCTCTTCAGGGACGGGGTGAACTGGGGGAGGATTGTGGCCTTCTTTGAGTTCGGTGGGGTCATGTGTGTGGAGAGCGTCAACCGGGAGATGTCGCCCCTGGTGGACAACATCGCCCTGTGGATGACTGAGTACCTGAACCGGCACCTGCACACCTGGATCCAGGATAACGGAGGCTGGGTAGGTGCACTTGGTGATGTGAGTCTGGGCTGAarrow_forward
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