Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 19.5, Problem 4COMQ
Summary Introduction
Introduction:
DSBs (double-stranded breaks) are the most dangerous form of DNA (deoxyribonucleic acid) damage, since they can result in DNA loss. A cell could end up losing an important gene, which could compromise the survival of the cell. There are DNA repair systems in place to take care of this, but there is still some amount of DNA that is lost.
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Students have asked these similar questions
A key difference between the original Holliday model and the double-strand break model is the way thata. the DNA strands are initially broken.b. branch migration occurs.c. a heteroduplex is formed.d. resolution occurs.
Following a CRISPR mediated DNA double-strand break, how can the DNA be repaired by the cell? Choose all that apply.
A. Base pairing between complementary sticky sides.
B. Nonhomologous end joining.
C. Homology directed repair.
D. Crossing over between nonhomologous chromosomes.
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Chapter 19 Solutions
Genetics: Analysis and Principles
Ch. 19.1 - 1. A mutation changes a codon that specifies...Ch. 19.1 - A down promoter mutation causes the promoter of a...Ch. 19.1 - 3. A mutation in one gene that reverses the...Ch. 19.1 - Which of the following is an example of a somatic...Ch. 19.2 - Prob. 1COMQCh. 19.3 - Which of the following is not an example of a...Ch. 19.3 - A point mutation could be caused by a....Ch. 19.3 - One way that TNRE may occur involves the formation...Ch. 19.4 - Nitrous acid replaces amino groups with keto...Ch. 19.4 - Prob. 2COMQ
Ch. 19.4 - Prob. 3COMQCh. 19.5 - The function of photolyase is to repair a....Ch. 19.5 - Which of the following DNA repair systems may...Ch. 19.5 - 3. In nucleotide excision repair in E. coli, the...Ch. 19.5 - Prob. 4COMQCh. 19.5 - An advantage of translesion-replicating...Ch. 19 - Is each of the following mutations a transition,...Ch. 19 - Prob. 2CONQCh. 19 - What does a suppressor mutation suppress? What is...Ch. 19 - Prob. 4CONQCh. 19 - X-rays strike a chromosome in a living cell and...Ch. 19 - Prob. 6CONQCh. 19 - Prob. 7CONQCh. 19 - 8. A point mutation occurs in the middle of the...Ch. 19 - Prob. 9CONQCh. 19 - Prob. 10CONQCh. 19 - 11. Is a random mutation more likely to be...Ch. 19 - 12. Which of the following mutations could be...Ch. 19 - Prob. 13CONQCh. 19 - Discuss the consequences of a germ-line versus a...Ch. 19 - Prob. 15CONQCh. 19 - Explain how a mutagen can interfere with DNA...Ch. 19 - What type of mutation (transition, transversion,...Ch. 19 - Explain what happens to the sequence of DNA during...Ch. 19 - Distinguish between spontaneous and induced...Ch. 19 - Prob. 20CONQCh. 19 - Prob. 21CONQCh. 19 - Prob. 22CONQCh. 19 - Trinucleotide repeat expansions (TNREs) are...Ch. 19 - 24. With regard to TNRE, what is meant by the term...Ch. 19 - 25. What is the difference between the mutation...Ch. 19 - Achondroplasia is a rare form of dwarfism. It is...Ch. 19 - Prob. 27CONQCh. 19 - In the treatment of cancer, the basis for many...Ch. 19 - Prob. 29CONQCh. 19 - 30. Which of the following examples is likely to...Ch. 19 - Prob. 31CONQCh. 19 - Prob. 32CONQCh. 19 - Prob. 33CONQCh. 19 - With regard to the repair of double-strand breaks,...Ch. 19 - Prob. 35CONQCh. 19 - Prob. 36CONQCh. 19 - 37. Three common ways to repair changes in DNA...Ch. 19 - Prob. 38CONQCh. 19 - Prob. 39CONQCh. 19 - Explain how the technique of replica plating...Ch. 19 - 2. Outline how you would use the technique of...Ch. 19 - 3. From an experimental point of view, is it...Ch. 19 - Prob. 4EQCh. 19 - Prob. 5EQCh. 19 - 6. Richard Boyce and Paul Howard-Flanders...Ch. 19 - In E. coli, a variety of mutator strains have been...Ch. 19 - 2. Discuss the times in a person’s life when it is...Ch. 19 - A large amount of research is aimed at studying...
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- Which of the following statements describe reversal of DNA repair mechanism. A. UV light blocks the translation of mRNA beyond the damaged area B. Reversal of DNA repair mechanism requires a DNA template C. UV light is needed to initiate the formation of pyrimidine dimers D. None of the statement is correctarrow_forward. Which of the following statements best describe the mismatch repair pathway?a. It is part of the 3′to 5′proofreading function of DNApolymerase.b. It acts after DNA replication by recognizing mismatched base pairs.c. It is activated by stalled replication forks.d. It is coupled to transcription.arrow_forwardYou want to propagate large amounts of a DNA fragment. To do this, use a plasmid vector. a) How should this plasmid vector be constructed? b) Also describe the function of the components.arrow_forward
- DNA Repair Systems a. counteract spontaneous and induced mutations b. counteract induced mutations only c. counteract amino acid changes introduced by mutations d. prevent DNA damagearrow_forwardWhich of the following mechanisms is involved in double-strand DNA repair? a. Homology-dependent repair b. Nonhomologous end joining c. Mismatch repair d. A and B e. A, B, and Carrow_forwardMatch the E. coli mismatch repair enzyme on the left with the appropriate function on the right. MutS MutH MutL a. facilitates the looping of the region of DNA to be replaced b. distinguish between parental and newly-synthesized DNA c. locates mismatches in the DNAarrow_forward
- Which type of cells were used to extract the DNA that was sequenced? a. red blood cells c. white blood cells b. intestinal epithelium d. cheek swab What type of mutation caused Nicholas’s disease? a. frameshift c. nonsense b. missense d. insertionarrow_forwardDouble-strand breaks can be repaired bya. homologous recombination repair (HRR).b. nonhomologous end joining (NHEJ).c. nucleotide excision repair (NER).d. both a and b.arrow_forwardDNA Polymerase holoenzymes used for DNA replication recognizes A. double-stranded sequences as starting points B. methylated lipids as start points C. acetylated lipids as start points D. single stranded sequences as starting pointsarrow_forward
- a. Why do bacteria make restriction endonucleases? b. What is it about the endonucleases that prevents bacteria from destroying their own DNA?arrow_forwardIf a virus particle contained double-stranded B-DNA of 400,000 base pairs, A. How many complete helical turns would occur on each strand? B. How many atoms of phosphorus would be present? C. If the mole % of G in this genome is 17%, what is the mole % of A?arrow_forwardYou used agarose gel electrophoresis to separate DNA fragments of different size and the experiment worked well. However, you wanted to re run the experiment but this time you made the gel with a higher percentage of Agarose. How might this affect your results compared to the first run? a. There would be no difference between the runs since it is the current, not the agarose that causes migration. b. The higher concentration of agarose would cause the DNA to break apart. c. You can't predict how the concetration of agarose would affect migration. d. The DNA fragments would migrate further down the gel than they did the first time. e. The DNA fragments wouldn't migrate as far down the gel as they did the first time.arrow_forward
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