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 14, Problem 7TYK
Summary Introduction
Introduction:
DNA or deoxyribonucleic acid produces replica of its original strands during cell division in a process called
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In Semi conservative replication:
A. After one round of replication of a single molecule of DNA, one DNA molecule will be produced that contains two parental strands of DNA and one DNA molecule will be
produced that contains two new (or de novo) strands.
B. After one round of replication of a single molecule of DNA, two resulting DNA molecules will be produced both of which contain a mix of both parental and new
DNA interspersed on every strand of DNA
C. After two rounds of replication of a single molecule of DNA, two resulting DNA molecules will contain both a parental strand and a new strand of DNA and the other
two resulting DNA molecules will contain all new (or de novo) DNA
D. After two rounds of replication of a single molecule of DNA, one resulting DNA molecule will contain 2 parental strands of DNA and the other three resulting DNA
molecules will contain all new (or de novo) DNA
E. A and C
F. B and D
What statement(s) apply to both eukaryotic and prokaryotic replication? Select all that apply.
a. There is a single origin of replication.
b. Replication is discontinuous on the lagging strand and continuous on the leading strand.
c. The sliding clamp is composed of PCNA.
d. Telomeres are replicated by telomerase.
e. Helicase unwinds the helix.
f. Replication is continuous on the lagging strand and discontinuous on the leading strand.
(d) Write down the sequences of the templates that would give the tetranucleotides shown in I and
II. In each case, label the 5' and 3' ends and indicate which template base is used first.
(e) What difference would it make to bidirectional DNA replication if both modes of chain extension
were equally favourable?
I
II
Chapter 14 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 14.1 - Prob. 1SBCh. 14.2 - Prob. 1SBCh. 14.2 - Prob. 2SBCh. 14.2 - Prob. 3SBCh. 14.2 - Prob. 4SBCh. 14.3 - What is the importance of complementary base...Ch. 14.3 - Why is a primer needed for DNA replication? How is...Ch. 14.3 - DNA polymerase III and DNA polymerase I are used...Ch. 14.3 - Prob. 4SBCh. 14.4 - Why is a proofreading mechanism important for DNA...
Ch. 14 - Working on the Amazon River, a biologist isolated...Ch. 14 - Prob. 2TYKCh. 14 - Pyrimidines built from a single carbon ring are:...Ch. 14 - Which of the following statements about DNA...Ch. 14 - Which of the following statements about DNA is...Ch. 14 - Prob. 6TYKCh. 14 - Prob. 7TYKCh. 14 - Prob. 8TYKCh. 14 - Prob. 9TYKCh. 14 - Prob. 10TYKCh. 14 - Discuss Concepts Eukaryotic chromosomes can be...Ch. 14 - Prob. 12TYKCh. 14 - Prob. 13TYKCh. 14 - Discuss Concepts During replication, an error...Ch. 14 - Design an Experiment Design an experiment using...Ch. 14 - Prob. 16TYKCh. 14 - Prob. 1ITDCh. 14 - Prob. 2ITD
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- A diagram of a prokaryotic replication fork is shown. As in class, RNA primers are represented by a wavy line and DNA represented by a straight line. From the list below pick all the statements that are TRUE of this replication fork. (Multiple answers possible) A.Primer sequences are not correct. B. DNA being synthesized is not complementary and antiparallel to the template. C. Direction of DNA synthesis is not correct (not 5' to 3'). D. At least one protein in the diagram is mislabeled.arrow_forwardMatch the enzymes provided from (1-4) in the list of choices with their matching function (A-D) during DNA replication. A. Disrupts hydrogen bonds between DNA bases B. Can only add nucleotides to an existing 3 OH end C. Can't add nucleotides to a chain, but can make covalent bonds D. Actually a specialized form of RNA polymerase select 1. DNA polymerase select 2. Primase select 3. Ligase select v 4. Helicasearrow_forward5) In DNA replication, which of the following events happens during both leading and lagging strand synthesis? a. RNA primers help initiate DNA synthesis. b. Topoisomerase separates complementary strands of DNA. c. Ligase joins together multiple Okazaki fragments. d. DNA polymerase synthesizes a single, continuous strand of DNA. Explain WHY? 6) Suppose you are provided with an actively dividing culture of E. coli bacteria to which radioactive thymine has been added. What would happen if a cell replicates once in the presence of this radioactive base? a. One of the daughter cells, but not the other, would have radioactive DNA. b. Neither of the two daughter cells would be radioactive. c. All four bases of the DNA would be radioactive. d. DNA in both daughter cells would be radioactive. Explain WHY?arrow_forward
- You are studying a colony of cells and determine that some of these cells have a mutated DNA polymerase I that results in loss of function of this enzyme. A) What will the effect of the mutation in DNA polymerase I be on DNA replication? In your answer make sure to describe what would be observed in the leading and lagging strand and explain your reasoning. B) Will this mutation in DNA polymerase I have an impact on another step in DNA replication? In your answer make sure to indicate whether DNA replication will be impacted or not. If it is not, explain why. If it is impacted, then describe the step that is impacted and name the molecule or enzyme involved.arrow_forwardWhich of the following statements about RNA is/are incorrect? I. RNA strand synthesis does not occur during replication. II. All RNA strands produced during transcription are translated into proteins. III. RNA strands are composed of 10 nucleotide bases per turn. IV. RNA strands can pair with a DNA strand. V. RNA may be synthesized in the 5'-3' orientation and vice-versa (3'-5') depending on the orientation of the template DNA strand O I, II, and IV O I, II, III, IV, and V O II, IV and V O II, IV and V OI, II, III and V O Il and IIIarrow_forwardWhich statement below is true? Select one: a. Okazaki fragments are produced in eukaryotic DNA replication but not in prokaryotic DNA replication. b. In both eukaryotes and prokaryotes, the template strand of DNA is read in the template’s 3’ to 5’ direction, while the new strand DNA is synthesized in new strand’s 5’ to 3’ direction. c. In eukaryotes, synthesis of the new DNA strand is from 5’ to 3’, whereas in prokaryotes it is random. d. In eukaryotes, synthesis of the new DNA strand is from 5’ to 3’, whereas in prokaryotes it is from 3’ to 5’. e. In eukaryotes, synthesis of the new DNA strand is from 3’ to 5’, whereas in prokaryotes it is from 5’ to 3’.arrow_forward
- Which of the following statements is not true? Explain why. A. A DNA strand can serve as a template strand on many occasions. B. Following semiconservative DNA replication, one strand is a newly made daughter strand and the other strand is a parental strand. C. A DNA double helix may contain two strands of DNA that were made at the same time. D. A DNA double helix obeys the AT/GC rule. E. A DNA double helix could contain one strand that is 10 generations older than its complementary strand.arrow_forwardWhich of the following statements about the DNA replication is false? a. Synthesis of the new DNA strands is form 39 to 59 b.Synthesis of the new DNA strands is from 59 to 39 c. DNA Unwinds, primase adds RNA primer, DNA polymerases synthesize the new strand and remove the RNA primer d. Many initiation points exist in each eukaryotic chromosome. e. Okazaki fragments are synthesized in the opposite direction from the direction in which the replication for moves.arrow_forwardThe reaction in DNA replication catalyzed by DNA ligase isa) Addition of new nucleotides to the leading strandb) Addition of new nucleotide to the lagging strandc) Formation of a phosphodiester bond between the 3’-OH of one Okazaki fragment and the 5’-phosphate of the next on the lagging strandd) Base pairing of the template and the newly formed DNA strandarrow_forward
- DNA polymerase occasionally incorporates the wrong nucleotide during DNA replication. If left unrepaired, the base-pair mismatch that results will lead to mutation in the next replication. As part of a template strand, the incorporated wrong base will direct the incorporation of a base complementary to itself, so the bases on both strands of the DNA at that position will now be different from what they were before the mismatch event. The MM-minus strain of yeast does not have a functional mismatch excision repair system, but it has normal base excision repair and nucleotide excision repair systems. Which of the following statements is correct about differences in the mutation spectrum between MMR-minus and wildtype yeast? More than one answer is correct. (a) More point mutations will arise in MMR-minus yeast. Fewer point mutations will arise in MMR-minus yeast as compared with wildtype. (b) Of the total point mutations that do occur, the fraction in which G is replaced by C will be…arrow_forwardIn observing replication of prokaryotic plasmids by electron microscopy, it is apparent that: a. replication is initiated at two distinct origins of replication. b. the template strands completely unwind before replication begins. c. replication initiates from a single origin, creating a replication bubble d. the plasmid is linearized prior to replicationarrow_forwardConsider a DNA molecule with the following structure a. if during replication , the T at position 4 is read as an A resulting in a misincorporation in the new DNA strand . If the misincorporation is not repair , draw or write the results of the second round of replication b. After the second round of replication , what specific type of point mutation is now permanent in the DNA sequence ? c. List the two cellular mechanisms that failed to prevent the establishment of this permanent mutation .arrow_forward
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