Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 15, Problem 7TYK
Summary Introduction
Introduction:
Missense mutation occurs when a sense codon for an amino acid is changed to a different sense codon for a different amino acid.
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Based on the given description, determine which mutation is being referred to
A single base substitution such as UCC --> UGC
a. silent
b. insertion
c. deletion
d. transversion
e. nonsense
f. transition
An individual with the genetic condition cystic fibrosis has CFTR protein with the amino acid histidine (at position 482), where the normal CFTR protein has arginine. No other changes are observed in the protein.
This is the result of a ____ mutation.
Select one:
a.
nonsense
b.
frameshift
c.
silent
d.
missense
Which of the following terms refer to the case when a mutation results in a significant decrease or a complete loss of the functional activity of a gene product?
a. gain-of-function mutation
b. loss-of-function mutation
Chapter 15 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 15.1 - Prob. 1SBCh. 15.1 - If the codon were five bases long, how many...Ch. 15.2 - For the DNA template below, what would be the...Ch. 15.2 - Prob. 2SBCh. 15.3 - Prob. 1SBCh. 15.3 - Prob. 2SBCh. 15.4 - Prob. 1SBCh. 15.4 - Distinguish between the P, A, and E sites of the...Ch. 15.4 - Prob. 3SBCh. 15.5 - How does a missense mutation differ from a silent...
Ch. 15.5 - Prob. 2SBCh. 15.5 - Prob. 3SBCh. 15.5 - Prob. 4SBCh. 15 - Eukaryotic mRNA: usessnRNPs to cut out introns and...Ch. 15 - A segment of a strand of DNA has a base sequence...Ch. 15 - Prob. 3TYKCh. 15 - Prob. 4TYKCh. 15 - Which of the following statements is false? a. GTP...Ch. 15 - Prob. 6TYKCh. 15 - Prob. 7TYKCh. 15 - Prob. 8TYKCh. 15 - Prob. 9TYKCh. 15 - A part of an mRNA molecule with the sequence 5-UGC...Ch. 15 - Discuss Concepts A mutation occurs that alters an...Ch. 15 - Discuss Concepts The normal form of a gene...Ch. 15 - Prob. 13TYKCh. 15 - Prob. 14TYKCh. 15 - Prob. 15TYKCh. 15 - Prob. 16TYKCh. 15 - Prob. 17TYKCh. 15 - Prob. 1ITD
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- The word mutation is generally considered to be negative. However, is there a positive side to mutations? Briefly explain your answer.arrow_forwarda. Some antibiotics, such as rifampin, interfere with the function of RNA polymerase. What biological process is rifampin disrupting? b. Some antibiotic-resistant M. tuberculosis bacteria have a single point mutation (CàT) in the rpoB gene that causes an amino acid change from serine (a polar amino acid) to leucine (a non-polar amino acid). What type of mutation is this? Do you expect this to have no effect, a small effect, or a large effect on the polypeptide produced? Explain your reasoning. c. The rpoB gene encodes a subunit of the bacterial RNA polymerase protein. The point mutation described in Question 2 causes a change in protein folding, which leads to the inability of the rifampin antibiotic to bind to the RNA polymerase. Which level(s) of protein structure is/are affected by this change?arrow_forwardA point mutation is a mutation that arises when one nucleotide in the genetic sequence is substituted, added or deleted. Two possible point mutations are given below: Mutation A. Lysine is substituted for Leucine Mutation B: Serine is substituted for Threonine Which mutation is likely to be more serious? E Explainarrow_forward
- Which of the following mutations would have the greatest negative impact on the protein product of a gene? A. a single base deletion close to the end of the coding region of a gene. B. a single base insertion near the start of the coding region of the gene C. a base-pair substitution D. a deletion of three bases near the middle of the genearrow_forwardThe figure shows the position of two of these mutations a and b. The nucleotides are altered in these 2 different swo-1 mutant alleles. Use the genetic table to describe any AA changes.Name the type of mutation and describe its effect on swo-1 mRNA and protein for each of the mutations. 3. The swo-1 a mutation (insertion between C and G). 4. The swo-1 b mutation (C-to-T mutation for indicated C). 5. The swo-1 a mutation leads to worms with more body wall muscle, whereas worms with the swo-1 b mutation are not able to move. Based on these phenotypes and the findings from questions 3 and 4, describe the role thewild-type version of this protein plays in muscle function.arrow_forwardWhich of the following best describes this type of mutation? Original – CCU-GAU-GAG-UCA Mutated – CCU-GAU-GAG-UGA* Please choose one correct answer only A. Missense B. Nonsense C. Silent D. Frameshiftarrow_forward
- Define FOUR (4) types of point mutations within coding sequencesarrow_forwardComplete each of the following statements by selecting from the bank of terms below. a. tRNA b. spontaneous c. repressible d. RNA processing e. mutagen f. SNRNA g. redundancy h. universal i. promoter j. elongation There are several three nucleotide codons that code for the same amino acid. This is known as (81). A specific three nucleotide codon for a fruit fly codes for the same amino acid as that same specific three nucleotide codon for a human. This means that the genetic code is (82). The three steps of transcription are initiation, (83), and termination. The (84) region on a chromosome is the sequence of nucleotides in DNA that indicates where the RNA polymerase complex should bind to initiate transcription. In a eukaryotic cell mRNA is modified in three ways. This is known as (85). The role of (86) is to combine with protein and then bind to introns to remove them and splice the RNA together. The role of (87) is to transport amino acids to the ribosome where the anticodon loop…arrow_forwardExplain point mutations and frameshift mutations. Which is more apt to disrupt the structure and or function of a protein coded for by a gene? Why?arrow_forward
- a. The reading frame DNA sequence is: b. The mRNA sequence is: c. The polypeptide sequence is: A disease in frogs which causes their tongue to fall out of their mouths is killing the frog population in LA County. You obtain a dead frog and isolate its gene Xf. When you sequence this mutated gene, you find that the last ‘G’ at the end of the first line of this sequence has been deleted (i.e. the G at position 86). In order to determine how this mutation changes the resulting polypeptide, write the mutated polypeptide sequence in the space below. What kind of mutation was produced? The mutated polypeptide sequence is What kind of mutation was produced?arrow_forwardA molecular geneticist hopes to find a gene gene in human liver cells that codes for an important blood clotting protein. He knows that the nucleotides sequence of a small part of the gene is GTGGACTGACA. briefly explain how to obtain the desired genearrow_forwardDo you think each of the following types of mutationswould have very severe effects, mild effects, or no effectat all?a. Nonsense mutations occurring in the sequences encoding amino acids near the N terminus of the proteinb. Nonsense mutations occurring in the sequences encoding amino acids near the C terminus of the proteinc. Frameshift mutations occurring in the sequences encoding amino acids near the N terminus of the protein d. Frameshift mutations occurring in the sequencesencoding amino acids near the C terminus of theproteine. Silent mutationsf. Conservative missense mutationsg. Nonconservative missense mutations affecting theactive site of the proteinh. Nonconservative missense mutations not in the active site of the proteinarrow_forward
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