Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 7.3, Problem 4TQ
Summary Introduction
To review:
The reason for the reproductive synchronization in amino acid deprived conditions.
Introduction:
The process of copying nuclear DNA (deoxyribonucleic acid) in the cells to make multiple copies is called synchronous replication. The reproduction where fertile mating across a population is clustered temporarily is called synchronized reproduction. Usually in the presence of amino acid, bacteria do not show this halt or clusterization and hence, their reproduction is said to be asynchronous.
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Chapter 7 Solutions
Microbiology: An Evolving Science (Fourth Edition)
Ch. 7.2 - Prob. 1TQCh. 7.2 - Prob. 2TQCh. 7.2 - Prob. 3TQCh. 7.2 - Prob. 4TQCh. 7.3 - Prob. 1TQCh. 7.3 - Prob. 2TQCh. 7.3 - Prob. 3TQCh. 7.3 - Prob. 4TQCh. 7.3 - Prob. 5TQCh. 7.6 - Prob. 1TQ
Ch. 7.6 - Prob. 2TQCh. 7.6 - Prob. 3TQCh. 7 - Prob. 1RQCh. 7 - Prob. 2RQCh. 7 - Prob. 3RQCh. 7 - Prob. 4RQCh. 7 - Prob. 5RQCh. 7 - Prob. 6RQCh. 7 - Prob. 7RQCh. 7 - Prob. 8RQCh. 7 - Prob. 9RQCh. 7 - Prob. 10RQCh. 7 - Prob. 11RQCh. 7 - Prob. 12RQCh. 7 - Prob. 13RQCh. 7 - Prob. 14RQCh. 7 - Prob. 15RQCh. 7 - Prob. 1TQCh. 7 - Prob. 2TQCh. 7 - Prob. 3TQ
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- Why are prokaryotes able to replicate so much more quickly than eukaryotes? What cellular components must be copied before a cell splits in two? Why is this difference in replication rate an important part of our vulnerability to bacterial pathogens?arrow_forwardHow does DNA replication occur in a precise manner to ensure that identical genetic information is put into the new chromatid? See Figures 8.12 and 8.13. FIGURE 8.12 In DNA replication, the two polynucleotide strands uncoil, and each is a template for synthesizing a new strand. A replicated DNA molecule contains one new strand and one old strand. This mechanism is called semiconservative replication. FIGURE 8.13 A close-up look at the process of DNA replication. (a) As the strands uncoil, bases are added to the newly synthesized strand by complementary base pairing with bases in the template strand. The new bases are linked together by DNA polymerase. (b) DNA synthesis can proceed only in the 5 3 direction; newly synthesized DNA on one template strand is made in short segments and linked together by the enzyme DNA ligase.arrow_forwardIn eukaryotes, the DNA replication rate is 50 nucleotides per second. How long would the replication of a chromosome of 150 million base pairs take if eukaryotic chromosomes were replicated like those of prokaryotes? Actually, eukaryotic replication takes only several hours. How do eukaryotes achieve this high rate?arrow_forward
- In eukaryotes, replication starts more or less simultaneously at multiple points of origin along a chromosome. What pattern of radioactivity would be found after briefly exposing to radioactive adenine a cell that is just beginning to replicate, and then quickly replacing the radioactive with nonradioactive adenine? many short sections of radioactive DNA one radioactive section of DNA starting at one particular end of the chromosomes many short radioactive strands of DNA in the leading strands only many short radioactive sections of DNA in the lagging strands only no radioactive sections in the DNAarrow_forwardThe above experiment, on DNA synthesis in the intact chromosomes of E. coli (with no virus infection), demonstrates which of the following forms of DNA replication? completely discontinuous replication completely conservative replication completely dispersive replication semi-discontinuous replication semi-conservative replicationarrow_forwardReiji Okazaki and Tuneko Okazaki were the first to demonstrate which of the following patterns inthe initial phases of chromosomal replication in prokaryotic cells?A. completely discontinuous DNA replicationB. completely conservative DNA replicationC. completely dispersive DNA replicationD. semi-discontinuous DNA replicationE. semi-conservative DNA replicationarrow_forward
- What is the survival value of semiconservative reproduction of DNA? : What is the survival value of semiconservative reproduction of DNA? – Define what semiconservative reproduction is and the explain why this would have survival value. Please answer this is 2-3 sentencesarrow_forwardAll of the following are differences between prokaryotic and eukaryotic replication except for: Group of answer choices 1 Eukaryotes lose parts of their chromosomes after each round of replication 2 Eukaryotes have multiple origins of replication 3 Prokaryotes have fewer types of DNA polymerases 4 Prokaryotes have to replicate nucleosomesarrow_forwardWhich of the following components is not involved during the formation of the replication fork? a. single-strand binding proteins b. helicase c. origin of replication d. ligasearrow_forward
- Why is DNA copying is the essential part of the process of reproduction?arrow_forwardConsider a hypothetical phage whose DNA replicates exclusively by rolling circle replication. A phage with radioactive DNA in both strands infects a bacterium and is allowed to replicate in a nonradioactive medium. Assume that only daughter DNA from the elongated branch ever gets packaged into progeny particles. What fraction of the parental radioactivity will appear in the progeny phage? How many progeny phage will contain radioactive DNA? What is the fundamental difference between the initiation of θ replication and that of the rolling circle?arrow_forwardUsing 14N isotope medium for DNA replication instead of 15N, what would be observed ifDNA replication were conservative in one cycle of replication/in three cycles? How aboutdispersive replication in one cycle, in three cycles?arrow_forward
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