Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 14, Problem 13TYU
SYNTHESIZE YOUR KNOWLEDGE
Some mutations result in proteins that function well at one temperature but are nonfunctional at a different (usually higher) temperature. Siamese cats have such a “temperature-sensitive” mutation in a gene encoding an enzyme that makes dark pigment in the fur. The mutation results in the breed's distinctive point markings and lighter body color (see the photo). Using this information and what you learned in the chapter, explain the pattern of the cat’s fur pigmentation.
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You suspect a protein that is being expressed has been affected by a mutation. When you examine the fully functional protein you find curiously that it still has retained all of its overall function. A friend of yours doing research with you assures you when examining the genetic data a new mutation does in fact exist in this protein. What is the most likely type of mutation that occurred based on this information?
Group of answer choices
frameshift mutation
silent mutation
nonsense mutation
A gene affecting the behavioral outlook of individuals was discovered in several humans who can overcome anxiety caused by life's problems. Part of the gene that į translated into protein has a sequence 3'-GGATCCCGAATGTAATGCGTGCTC AATGGTAGTACGGC-5'.
1. What is the complementary strand of the DNA?
2. What is the sequence of the MRNA product after translation?
3. What is the sequence of the peptide encoded by the portion of the gene? (Use one letter symbol of amino acids)
Transcribe and translate the mutated sequence #1. Determine the consequence, if any, for each mutation. You will need to use your codon charts in your ISN. Practice with both charts.
Chapter 14 Solutions
Campbell Biology in Focus
Ch. 14.1 - MAKE CONNECTIONS In a research article about...Ch. 14.1 - What polypeptide product would you expect from a...Ch. 14.1 - DRAW IT The template strand of a gene contains the...Ch. 14.2 - What is a promoter? Is it located at the upstream...Ch. 14.2 - What enables RNA polymerase to start transcribing...Ch. 14.2 - WHAT IF? Suppose X-rays caused a sequence change...Ch. 14.3 - Given that there are about 20,000 human genes, how...Ch. 14.3 - How is RNA splicing similar to how you would watch...Ch. 14.3 - WHAT IF? What would be the effect of treating...Ch. 14.4 - What two processes ensure that the correct amino...
Ch. 14.4 - Discuss the ways in which rRNA structure likely...Ch. 14.4 - Describe how a polypeptide to be secreted is...Ch. 14.4 - WHAT IF? DRAW IT Draw a tRNA with the anticodon...Ch. 14.5 - What happens when one nucleotide pair is lost from...Ch. 14.5 - Prob. 2CCCh. 14.5 - WHAT IF? DRAW IT The template strand of a gene...Ch. 14 - In eukaryotic cells, transcription cannot begin...Ch. 14 - Prob. 2TYUCh. 14 - The anticodon of a particular tRNA molecule is A....Ch. 14 - Prob. 4TYUCh. 14 - Which component is not directly involved in...Ch. 14 - Prob. 6TYUCh. 14 - Prob. 7TYUCh. 14 - Prob. 8TYUCh. 14 - Prob. 9TYUCh. 14 - SCIENTIFIC INQUIRY Knowing that the genetic code...Ch. 14 - Prob. 11TYUCh. 14 - FOCUS ON INFORMATION Evolution accounts for the...Ch. 14 - SYNTHESIZE YOUR KNOWLEDGE Some mutations result in...
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- PLEASE ANSWER WHY? Some substitution mutation result in a malfunctioning protein but others do not. Why is this? arrow_forwardUse this mRNA coding sequence as your starting point. This sequence begins with a start codon and ends with a stop codon, so it is only looking at the region of DNA that directly encodes a protein sequence. 5’-AUGCACAAAUUAGAGUACCCCCCAGGAAGGUAG-3’ Make the following mutation in this sequence by changing/adding/removing only one nucleotide. Make the mutation easy to see (a different color, circled, something like that) 1) A silent mutation that is also a transitionarrow_forwardUse this mRNA coding sequence as your starting point. This sequence begins with a start codon and ends with a stop codon, so it is only looking at the region of DNA that directly encodes a protein sequence. 5’-AUGCACAAAUUAGAGUACCCCCCAGGAAGGUAG-3’ Make the following mutation in this sequence by changing/adding/removing only one nucleotide. Make the mutation easy to see (a different color, circled, something like that) A missense mutation that is also a transversionarrow_forward
- Use this mRNA coding sequence as your starting point. This sequence begins with a start codon and ends with a stop codon, so it is only looking at the region of DNA that directly encodes a protein sequence. 5’-AUGCACAAAUUAGAGUACCCCCCAGGAAGGUAG-3’ Make the following mutation in this sequence by changing/adding/removing only one nucleotide. Make the mutation easy to see (a different color, circled, something like that) A nonsense mutationarrow_forwardUse this mRNA coding sequence as your starting point. This sequence begins with a start codon and ends with a stop codon, so it is only looking at the region of DNA that directly encodes a protein sequence. 5’-AUGCACAAAUUAGAGUACCCCCCAGGAAGGUAG-3’ Make the following mutation in this sequence by changing/adding/removing only one nucleotide. Make the mutation easy to see (a different color, circled, something like that) A frameshift mutationarrow_forwardYou are working on a protein for a research project. The protein does not express well in prokaryotic expression systems so you decide to try a eukaryotic system, baker’s yeast, instead. As part of the expression system, you add a signal peptide to the protein so that it will be exported through the endomembrane system to the outside of the yeast cell. This makes purifying the protein much simpler. During the purification, you notice that the protein is heavier than it should be during gel filtration chromatography. This is confirmed by SDS-PAGE. What could be the reason that the protein has gained mass when expressed in the eukaryotic system?arrow_forward
- You are studying a mutation in mice, which acts dominantly. Mice that have only one copy of the allele carrying this mutation have a kinky tail phenotype. You identify the gene that the mutation affects and find that the codon that encodes the second amino acid in the predicted protein has been mutated to a stop codon. Would you characterize this mutation as a loss-of-function or a gain-of-function and what specific subtype (hypermorphic, antimorphic, etc. ) within these categories? Explain your reasoning.”arrow_forwardGIVE A SHORT ANSWERS TO QUESTIONS GIVEN BELOW Why Phosphate bond is important in DNA or RNA structure?Why G-C forms three hydrogen bonds while A-T forms only two?Briefly explain the importance of poly A tail of mRNA.What is nonsense mutation? Describe with an example.Write the importance of polypeptide bond.Is this possible to create a DNA sequence from an RNA and how?Which gene mutation is much severe and why?What are the possible outcome of Chromosome mutation?Define the domain and motif of protein. Why they are required?arrow_forwardA set of nucleotides in an original DNA strand reads TACGCGAAT transcribe the short DNA sequence. translate the short DNA sequence.arrow_forward
- Complete the protein synthesis for the partial DNA sequence for a normal FGFR3 gene (TOP) and mutated FGFR3 gene (BOTTOM). Remember, when filling in mRNA, use capital letters only. When filling in amino acids, use three letters, with the first letter capitalized. If you do not use this format, your answer may be marked wrong. DNA CCG TTC GGG GAA ССС MRNA Amino Acid DNA CCG TTC GGG GAA TCC MRNA Amino Acidarrow_forwardSickle cell anemia is a widespread disease in many African countries and can be caused by a change in the amino acid sequence from glutamic acid to valine. A patient is diagnosed with the disease and a genetic fingerprint reveals the following DNA sequence for the gene: (a) (b) (c) (d) (e) Write down the mRNA sequence for the given DNA sense strand indicating the polarity. Derive the polypeptide from the mRNA molecule using the table of the genetic code (Table Q1 below) again indicating the polarity of the peptide chain. Indicate the position in the DNA molecule that could have caused the disease and write down all possible point mutations in the DNA sequence that could have caused it. [ The polypeptide chain is polymerized at the ribosomes using t-RNA molecules. Write down all possible t-RNA molecules with their anti-codons that are used to polymerize the amino acid VAL. Indicate the polarity. 3'-TAC TGA GCA AGA TTA CAT ACT-5' Explain what is meant by redundancy of the genetic code.…arrow_forwardGene editing is also used to explore the structure and function ofproteins. For example, changes can be made to the coding sequenceof a gene to determine how alterations in the amino acid sequenceaffect the function of a protein. Let’s suppose that you areinterested in the functional importance of a particular glutamicacid (an amino acid) within a protein you are studying. By geneediting, you make mutant proteins in which the glutamic acidcodon has been changed to other codons. You then test the encodedmutant proteins for functionality. The results are as follows: FunctionalityNormal protein 100%Mutant proteins containingTyrosine 5%Phenylalanine 3%Aspartic acid 94%Glycine 4%From these results, what would you conclude about the…arrow_forward
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