Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Chapter 14, Problem 7PDQ
Assuming that each
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What is the molecular weight of an MRNA that codes for the protein of molecular weight 75000KD?
(Assume the molecular weight of an amino acid residue is 120 Da)
if a protein that contain the two codon sequences showed a molar mass of 97,313 g /mol and the UV data showed that it contains 0.67 % Tyrosine amino acid by weight. How many Tyrosine amino acids this protein contain?
If this protein that was formed contains a total of 865 amino acids long, how many nucleic acids are there in the mRNA including the initiator and the terminator codons?
Indicate the amino acid sequence of the protein encoded by the following mRNA molecule. Use the genetic code table and assume that the very first “AUG” the ribosome encounters will serve as the start codon and specify methionine.
5’-AAUUCAUGCCCAAAUUUGGGGCACGAAGCUUCUUAGGCUAGUCCUAAAAAA-3’
Chapter 14 Solutions
Concepts of Genetics (12th 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 - Given that a faulty ribosomal protein is the...Ch. 14 - A couple with a child affected with DBA undergoes...Ch. 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 - When a codon in an mRNA with the sequence 5-UAA-3...Ch. 14 - Discuss the potential difficulties of designing a...Ch. 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 - Several amino acid substitutions in the and ...Ch. 14 - Define and compare the four levels of protein...Ch. 14 - What are the two common types of protein secondary...Ch. 14 - How do covalent disulfide bonds, hydrogen bonds...Ch. 14 - Prob. 27PDQCh. 14 - List three different types of posttranslational...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 - Many antibiotics are effective as drugs to fight...Ch. 14 - The flow of genetic information from DNA to...Ch. 14 - Prob. 37ESP
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- The following RNA sequence represents a small messenger which can be translated in a prokaryotic cell: 5'-ACGAAUGCACAGUAAAACUGGCUAGCGUAGGCUGA-3 Assume that the messenger RNA is translated in the cell, using the correct machinery and signals required for accurate protein synthesis. Using this RNA sequence and the Genetic Code Dictionary (see your textbook for the dictionary), solve the following problems A. Write the sequence of a protein that would be translated from this mRNA, using the appropriate stop and start signals, and indicating the correct termini of the protein product. B. Suppose that the underlined A in the sequence is changed to a U. Write the expected protein product of this mRNA.arrow_forwardThe 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_forwardKnowing that the genetic code is almost universal, a scientist uses molecular biological methods to insert the human β-globin gene (Shown in Figure 17.11) into bacterial cells, hoping the cells will express it and synthesize functional β-globin protein. Instead, the protein produced is nonfunctional and is found to contain many fewer amino acids than does β-globin made by a eukaryotic cell. Explain why.arrow_forward
- A normal hemoglobin protein has a glutamic acid at position 6; in sickle-cell hemoglobin, this glutamic acid has been replaced by a valine. List all the possible mRNA codons that could be present for each type of hemoglobin. Can a single base change result in a change from Glu to Val in hemoglobin?arrow_forwardConsider the following coding 71 nucleotide DNA template sequence (It does not contain a translational start): 5’- GTTTCCCCTATGCTTCATCACGAGGGCACTGACATGTGTAAACGAAATTCCAACCTGAGCGGCGT GTTGAG-3’ By in vitro translating the mRNA, you determined that the translated peptide is 15 amino acids long. What is the expected peptide sequence in single letter abbreviations?arrow_forwardExplain the function of spliceosomes in eukaryotic cells. The following sequence represents pre-mRNA derived from a gene coding for alpha keratin in birds. Label the sequence to show potential exon(s), intron(s) and spliceosome cut site(s). That is, put the intron(s) sequences in parentheses and use black slash symbols (/) to indicate the spliceosome cut site(s). What is the sequence of the mature MRNA after splicing? [ 5' AUGGGUUUAGGACCCCCGAUAAA 3'arrow_forward
- Assuming that each nucleotide is 0.34 nm long in mRNA, howmany triplet codes can simultaneously occupy space in a ribosomethat is 20 nm in diameter?arrow_forwardA eukaryotic cell carrying out transcription and RNA processing is incubated with 32P-labeled ATP. Where will the radioactive isotope appear in mature mRNA if the ATP is labeled at the (a) α position, (b) β position, and (c) γ position?arrow_forwardAssume the following portion of an mRNA. Find a start signal, and write the amino acid sequence that is coded for. 5'-GCCAUGUUUCCGAGUUAUCCCAAAGAUAAAAAAGAG 3'arrow_forward
- Using the genetic code table provided below, write out the sequence of three different possible mRNA sequences that could encode the following sequence of amino acids: Met-Phe-Cys-Trp-Glu C A G U C UUU Phe UCU Ser UUC Phe UCC Ser UCA Ser UUA Leu UUG Leu UCG Ser CUU Leu CCU Pro CUC Leu CUA Leu CUG Leu CCG A CAU His CGU Arg CCC Pro CAC His CGC Arg UAU Tyr UGU Cys U UAC Tyr UGC Cys C Stop UGA Stop Stop UGG Trp UAA A UAG G CCA Pro CAA Gln Pro CAG AUU lle AUC lle AUA lle AUG Met ACG G 등등 Gln CGA Arg CGG Arg ACU Thr AAU Asn AGU Ser ACC AAC Asn AGC Ser Thr ACA Thr Thr AAA Lys AGA Arg AAG Lys AGG Arg GUU Val GCU Ala GAU Asp GGU Gly GGC Gly GUC Val GCC Ala GAC Asp GUA Val GCA Ala GAA Glu GGA Gly GUG Val GCG Ala GAG Glu GGG Gly U C A G U C A G SUAUarrow_forwardThe flu virus maximizes the use of its limited (13.5 kb) genome by using alternative translation initiation sites, overlapping reading frames, and ribosomal frameshifting. For example, part of the viral PA gene includes a rarely used CGU codon. When the ribosome pauses to translate this codon, it may slip ahead by one nucleotide and produce a polypeptide with a diff erent C-terminal sequence. From the partial mRNA sequence shown here, determine the normal polypeptide sequence and the sequence with the frameshift.arrow_forwardB) The beta chain of eukaryotic protein is made up of 141 amino acids. What is the minimum number of nucleotides for the mRNA coding for this polypeptide?arrow_forward
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