Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 6MCQ
The wall-less mycoplasmas are considered to be related to gram-positive bacteria. Which of the following would provide the most compelling evidence for this?
- a. They share common rRNA sequences.
- b. Some gram-positive bacteria and some mycoplasmas produce catalase.
- c. Both groups are prokaryotic.
- d. Some gram-positive bacteria and some mycoplasmas have coccus-shaped cells.
- e. Both groups contain human pathogens.
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Which of the following observations about a bacterium would distinguish it from the last eukaryotic common ancestor? a. A double-stranded DNA genome b. Lack of a membrane-bound structure surrounding the genome c. Fatty acids in the lipid bilayer of the plasma membrane d. Enclosed by a cell wall
Analyses of genomes have allowed researchers to determine that some cells have very small genomes. If you were asked to predict which organisms are likely to have smaller genomes than others, which option below would be MOST likely?
A.
Bacteria that live in plant hosts are likely to have smaller genomes than those that live in animal hosts as it takes a smaller variety of metabolic processes to survive in an animal host.
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Although less is known about Archaea than about Bacteria as fewer species have been studied, it is likely that Archaea have smaller genomes on average than Bacteria as they have fewer metabolic needs.
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Bacteria that are endosymbionts, living within a host, can survive with smaller genomes than free-living Bacteria because they can rely on their host for many of their needs.
D.
Protists generally have had smaller genomes than Bacteria because Bacteria have such large amounts of noncoding DNA.
Describe the Theory of Endosymbiosis. a) Briefly define the Endosymbiotic Theory. 2 pts,b) Explain why the Theory of Endosymbiosis is considered a “theory” and not a “hypothesis.” 3 pts,c) Provide a description of eukaryotic and prokaryotic cells, including at least 4 similarities and 4 structural differences. 4 pts,d) Describe the sequence of events with anaerobic ancestral proto-eukaryotes and aerobic prokaryotes that led to the formation of mitochondria and chloroplasts inside eukaryotic cells. (Be sure to define aerobic and anaerobic respiration.) 6 pts,e) Explain how each, the anaerobic ancestral proto-eukaryotes and aerobic prokaryotes, benefited from the relationship. 4 pts,f) Describe 7 pieces of evidence for this scientific theory. Some of this evidence will consist of a list of similarities between mitochondria characteristics and bacteria characteristics. Along with this list of similarities, explain HOW the characteristics are similar. 10 pts,g) The Endosymbiotic Theory…
Chapter 10 Solutions
Microbiology: An Introduction
Ch. 10 - Which of the following organisms are most closely...Ch. 10 - Here is some additional information on the...Ch. 10 - DRAW IT Use the additional information below to...Ch. 10 - DRAW IT Use the information in the table below to...Ch. 10 - NAME IT Use the key in the Applications of...Ch. 10 - Sergeys Manual of Systematic Bactenoiogy differs...Ch. 10 - Bacillus and Lactobacillus are not in the same...Ch. 10 - Prob. 3MCQCh. 10 - Which of the following is false about scientific...Ch. 10 - You could identify an unknown bacterium by all of...
Ch. 10 - The wall-less mycoplasmas are considered to be...Ch. 10 - Use the following choices to answer questions 7...Ch. 10 - Prob. 8MCQCh. 10 - Prob. 9MCQCh. 10 - Use the following choices to answer questions 9...Ch. 10 - The GC content of Micrococcus is 66-75 moles %,...Ch. 10 - Describe the use of a DNA probe and PCR for: a....Ch. 10 - SF medium is a selective medium, developed in the...Ch. 10 - Prob. 1CAECh. 10 - Prob. 2CAECh. 10 - Prob. 3CAE
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