WHAT IS LIFE? LAUNCHPAD 12 MO. SUB.
4th Edition
ISBN: 9781319106348
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 6, Problem 9MC
Summary Introduction
Introduction:
Mutations are changes in the sequence of nitrogenous bases in DNA.
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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
Which of the following is NOT true about mutations?
A. Mutations can be harmful but not beneficial to the cell
B. Nucleotide substitution in DNA can cause nonsense mutations
C. Nucleotide substitution in DNA can cause missense mutations
D. Mutagens increase the rate of mutation, but mutations are still random
E. Nucleotide insertion or deletion in DNA can cause frameshift mutations
Which of the following statements best describes the outcome of a mutation?
a.
A mutation always results in a mutant genotype
b.
A mutation always results in a mutant karyotype
c.
A mutation always results in a mutant phenotype
d.
A mutation always results in a mutant protein
Chapter 6 Solutions
WHAT IS LIFE? LAUNCHPAD 12 MO. SUB.
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following is true about the enzyme telomerase? A. It is found only in adult cells. B. It is responsible for telomere shortening. C. It can re-establish telomere length. D. It may speed up the aging process. E. It is expressed at low levels in cancer cells.arrow_forward18) MUTATIONS: A. Explain the difference between a point mutation and a frameshift mutation. B. Explain how the mutation (both a point mutation and frameshift mutation) might impact the production of proteins. C. Name one type of chromosome mutation and explain what it is.arrow_forwardWhich statement(s) below regarding DNA mutations is true: A. Mutations only occur in genes B. Mutations always result in phenotypic alterations C. Mutations are only induced by extrinsic (environmental) factors D. Mutations can occur in promoters E. Point mutations can be caused by transposons or “jumping genes”arrow_forward
- A.) There is no change in the DNA sequence if nucleotides are added or removed, it will have no effect to the cell. B.) Mutations in the DNA sequence are all irreversible. A. Statement A is correct B. Statement B is correct C. Both A and B are correct D. Both A and B are incorrectarrow_forwardNonsense mutations occur when: A.The new codon causes an incorrect amino acid to code for an incorrect protein B.The loss or gain of 1 or 2 nucleotides that affects the coding for a protein. C.An alteration in sequence results in a new codon that causes the code to create an incomplete protein. D.Chromosomes break, causing a loss of DNA E.Genes in chromosome mutate and code for incorrect DNAarrow_forwardA genetic researcher notices that individuals with a particular genetic disease have a shortened version of key protein involved in the diseased biochemical pathway. Which of the following mutations is most likely to result in the premature termination of protein synthesis? A. The disease is caused by a silent mutation. B. The disease is caused by a frameshift mutation. C. The disease is caused by a missense mutation. D. The disease is caused by a nonsense mutation.arrow_forward
- For each statement below indicate whether it is true or false: A. Strand discrimination during the process of DNA repair is based on DNA methylation B. The genetic code has 64 amino acid-specifying codons C. Mutations in germline cells are more consequential to subsequent generations than mutations in somatic cells.arrow_forwardAccording to our class discussions, which of the following is the most correct definition of a mutation? a. A permanent, heritable change in DNA base sequence b. Changes in the form of DNA packaging used in the nucleus C. Damage to DNA caused by random chemical reactions inside cells d. Damage to DNA bases caused by environmental factors, such as UV light or cigarette smokearrow_forwardOne unexpected result of the sequencing of the human genome was the finding that mutations in a single gene can be responsible for multiple distinct disorders. How do you think mutations in a single gene can have such diverse effects?arrow_forward
- Which statement about transposons is INCORRECT? a.A transposon is a small fragment of DNA that can move from one location in a chromosome to another location in the same chromosome. b.Transposon insertion into a gene causes a mutation that can be reversed by removal of the transposon. c.Transposon movement often occurs when the cell is under genomic stress. d.In nature, insertion of a transposon can be deliberately added into a harmful gene to enhance survival.arrow_forwardWhich of the following types of mutations will have the most devastating effect on a cell?A.frameshift mutationB. missense mutationC. nonsense mutationD. silent mutationarrow_forwardA mutation in a coding region of DNA, but that does not change the amino acid, would almostcertainly be considered a(n) ____________ allele.And this kind of mutation is also called ___________ .b. Most nonsense mutations would create __________ alleles.However, describe a situation in which a nonsense mutation would create an isomoprh allele.c. A missense mutation will usually create a(n) _________ allele.However, describe a situation in which a missense mutation would create a neomorph allele.arrow_forward
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