Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 10.2, Problem 3COMQ
DNA gyrase
a. promotes negative supercoiling.
b. relaxes positive supercoils.
c. cuts DNA strands as part of its function.
d. does all of the above
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In the dideoxy-sequencing reaction, what terminates DNA synthesis at a particular base? a. The absence of a base on the ddNTP halts the DNA polymerase. b. The ddNTP causes a break in the sugar–phosphate backbone. c. DNA polymerase will not incorporate a ddNTP into the growing DNA strand. d. The absence of a 3′-OH group on the ddNTP prevents the addition of another nucleotide.
DNA gyrasea. promotes negative supercoiling.b. relaxes positive supercoils.c. cuts DNA strands as part of its function.d. does all of the above
Which mechanism requires the ability to distinguish between newly synthesized and template strands of DNA?
a. Nucleotide selection
b. DNA proofreading
c. Mismatch repair
d. All of the above
Chapter 10 Solutions
Genetics: Analysis and Principles
Ch. 10.1 - 1. A bacterial chromosome typically contains
a. a...Ch. 10.2 - Mechanisms that make the bacterial chromosome more...Ch. 10.2 - 2. Negative supercoiling may enhance activities...Ch. 10.2 - 3. DNA gyrase
a. promotes negative supercoiling....Ch. 10.3 - 1. The chromosomes of eukaryotes typically contain...Ch. 10.4 - Which of the following is an example of a...Ch. 10.5 - What are the components of a single nucleosome? a....Ch. 10.5 - 2. In Noll’s experiment to test the...Ch. 10.5 - Prob. 3COMQCh. 10.5 - Prob. 4COMQ
Ch. 10.6 - Prob. 1COMQCh. 10.6 - 2. The role of cohesin is to
a. make chromosomes...Ch. 10 - Prob. 1CONQCh. 10 - Prob. 2CONQCh. 10 - 3. Describe the mechanisms by which bacterial DNA...Ch. 10 - Why is DNA supercoiling called supercoiling rather...Ch. 10 - Prob. 5CONQCh. 10 - Prob. 6CONQCh. 10 - Prob. 7CONQCh. 10 - Prob. 8CONQCh. 10 - Prob. 9CONQCh. 10 - 10. What is the function of a centromere? At what...Ch. 10 - Prob. 11CONQCh. 10 - 12. Describe the structures of a nucleosome and a...Ch. 10 - Beginning with the G1 phase of the cell cycle,...Ch. 10 - Draw a picture depicting the binding between the...Ch. 10 - 15. Compare heterochromatin and euchromatin. What...Ch. 10 - 16. Compare the structure and cell localization of...Ch. 10 - 17. What types of genetic activities occur during...Ch. 10 - Lets assume the linker region of DNA averages 54bp...Ch. 10 - 19. In Figure 10.12, what are we looking at in...Ch. 10 - 20. What are the roles of the core histone...Ch. 10 - A typical eukaryotic chromosome found in humans...Ch. 10 - Which of the following terms should not be used to...Ch. 10 - Discuss the differences between the compaction...Ch. 10 - 24. What is an SMC complex? Describe two...Ch. 10 - Two circular DNA molecules, which we can call...Ch. 10 - 2. Let’s suppose you have isolated DNA from a cell...Ch. 10 - 3. We seem to know more about the structure of...Ch. 10 - In Nolls experiment of Figure 10.11, explain where...Ch. 10 - When chromatin is treated with a salt solution of...Ch. 10 - 6. Let’s suppose you have isolated chromatin from...Ch. 10 - If you were given a sample of chromosomal DNA and...Ch. 10 - Consider how histone proteins bind to DNA and then...Ch. 10 - In Chapter 23, the technique of fluorescence in...Ch. 10 - Bacterial and eukaryotic chromosomes are very...Ch. 10 - The prevalence of highly repetitive sequences...Ch. 10 - Discuss and make a list of the similarities and...
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- DNA strands are anti-parallel and DNA polymerase can only synthesize DNA in a 5' to 3' direction. How does the enzyme synthesize both strands at the same time? A. The leading strand is sythesised in Okazaki fragments B. The lagging strand is synthesised in short Okazaki fragments. C. Only one strand is replicated. D. There are more than one DNA polymerase involved.arrow_forwardDNA fragments that are 500 bp, 1000 bp, and 2000 bp in length are separated by gel electrophoresis. Which fragment will migrate farthest in the gel? a. The 2000-bp fragment b. The 1000-bp fragment c. The 500-bp fragment d. All will migrate equal distances.arrow_forwardPlace the steps of sanger sequencing in order.A. A fluorescent laser excites the fragments and records the wavelength consistent with a single nucleotide. B. ddNTPs bind and stop chain extension.C. DNA fragments are separated by size through a capillary tube. D. DNA polymerase copies the target region of template DNA.E. The final nucleotide of each fragment is labeled with a fluorescent tag.arrow_forward
- Avery, MacLeod, and McCarty demonstrated that the transforming principle can be destroyed by DNase. Thus, DNA is the genetic material A. Both statements are correct B. Both statements are incorrect C. First statement is Correct, Second is Incorrect D. First statement is Incorrect, Second is Correctarrow_forwardNucleotide excision repair A. recognizes and repairs thymine dimers and other damaged bases in DNA B. corrects errors in nucleotide excision C. recognizes and removes mismatched bases after DNA synthesis is completed D. removes nucleotides that are incorrectly incorporated during DNA synthesisarrow_forwardThe function of a restriction enzyme is to a. prevent the movement of DNA outside the nucleus b. separate the DNA double helix c. cut the nucleotide sequence at a specific location in DNA d. proofread DNA for accidental damages and corrects these errorsarrow_forward
- In DNA replication, a primer is _____. a. what the original DNA strands are called b. a molecule that provides the energy for nucleotide attachments c. a regulatory protein that turns on the gene that starts DNA replication d. an enzyme that breaks the hydrogen bonds between base pairs e. a short piece of nucleic acid that serves as an attachment point for DNA polymerasearrow_forwardA researcher is performing PCR to amplify a sample of DNA. Unfortunately, he forgot to add the DNA primer prior to starting the experiment. Which of the following results is he most likely to observe? a. The reaction will work, but at a significantly slower rate. b. The reaction will work, but the product will contain many undesired mutations. c. The reaction will work, but amplify a region that was not his target. d. The reaction will be completely unsuccessfuarrow_forwardThe problem of synthesizing the lagging strand, in the sense that DNA synthesis can only occur in one direction, is manifested inA. creation of primers every so often as more of the template strand isuntwisted.B. formation of shorter DNA strands called Okazaki fragments.C. the need for the enzyme ligase to link short DNA strands together.D. All of the above choices are correct.arrow_forward
- A.) Damaged DNA can be reversed if nucleotides can be replaced with a proper nucleotide for a correct amino acid base. B.) Direct reversal of DNA repair can destroy the abnormal bonds of the nucleotides in the DNA sequence. a. Statement A is correct b. Statement B is correct c. Both A and B are correct d. Both A and B are incorrectarrow_forwardWhat would be the result if an organism’s telomerase were mutated and nonfunctional? a. No DNA replication would take place. b. The DNA polymerase enzyme would stall at the telomere. c. Chromosomes would shorten with each new generation. d. RNA primers could not be removed.arrow_forwardPolymerase Chain Reaction, or PCR, can Group of answer choices A. target a specific region of DNA and cut it out of the rest of the genetic material for further analysis. B. copy the number of copies of a selected region of DNA linearly. C. increase the number of copies of a selected region of DNA exponentially. D. copy the entire genome at least a dozen times.arrow_forward
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