PRESCOTT'S MICROBIOLOGY
11th Edition
ISBN: 2818440045677
Author: WILLEY
Publisher: MCG
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Chapter 7.3, Problem 2CC
Many archaea have genes encoding an FtsZ homologue. Describe how FtsZ might function in an archaeal life cycle.
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The theory of the endosymbiotic origin of mitochondria and chloroplasts was first proposed by the biologist Lynn
Which of the following statements provides support for the theory of endosymbiosis?
1. All the genes found in chloroplasts are homologous to genes found in the nucleus of eukaryotic cell.
2. Mitochondria contain their own ribosomes.
3. Proteins need a targeting sequence to be imported into a chloroplast.
4. Mitochondria can generate a proton gradient and harness it to synthesize ATP.
O A. 1, 2 and 3
B. 1 and 3
C. 2 and 4
D. 4 only
E. All of 1, 2, 3 and 4 are correct.
Under the endosymbiotic theory for the origin of the eukaryotic cell. The ancestor of mitochondria and chloroplasts original became part of mutualism with a larger host cell. Which of the following best explains this mutualism?
A) The mitochondria and chloroplasts provided specialized reproduction as part of the proto-germ line while the larger host cell provided energy for growth and reproduction.
B) The mitochondria and chloroplasts provided gene products that could be used by the larger host cell for improved parasitization.
C) The mitochondria and chloroplasts provided molecular energy in return for protection by the larger host cell.
D) The mitochondria and chloroplasts produce toxins that the larger cell utilized to defend itself from other cells mutually increasing the defense of all those involved.
The endosymbiotic hypothesis for the origin of chloroplasts from gram-negative prokaryotes is supported by all of the following lines of evidence except:
the presence of enzymes for the light-dependent and the dark reactions of photosynthesis
the presence of circular DNA resembling that of photosynthetic eubacteria
the presence of mRNA, tRNA, and rRNA similar to that of the cyanobacteria
their use of mitosis rather than binary fission during cell division
the presence of 70s ribosomes, consisting of 30s and 50s ribosomal subunits
Chapter 7 Solutions
PRESCOTT'S MICROBIOLOGY
Ch. 7.1 - MICRO INQUIRY In addition to chromosomes, what...Ch. 7.2 - MICRO INQUIRY Why is it important that the origin...Ch. 7.2 - MICRO INQUIRY What would be the outcome if FtsZ...Ch. 7.2 - MICRO INQUIRY Which step in the development of...Ch. 7.2 - Retrieve, Infer, Apply 1. Describe the three...Ch. 7.2 - Retrieve, Infer, Apply 2. How does the bacterial...Ch. 7.2 - Retrieve, Infer, Apply 3. Do you think MinCDE...Ch. 7.2 - Retrieve, Infer, Apply 4. Do you think Spiroplasma...Ch. 7.3 - What elements of the Sulfolobus spp. cell cycle...Ch. 7.3 - Many archaea have genes encoding an FtsZ...
Ch. 7.4 - MICRO INQUIRY Identify the regions of the growth...Ch. 7.4 - Retrieve, Infer, Apply Define microbial growth.Ch. 7.4 - Retrieve, Infer, Apply Describe the phases of the...Ch. 7.4 - Why would cells that are vigorously growing when...Ch. 7.4 - Calculate the growth rate constant and generation...Ch. 7.4 - Suppose the generation time of a bacterium is 90...Ch. 7.5 - What is the difference between halophilic and...Ch. 7.5 - Why do facultative anaerobes grow best at the...Ch. 7.5 - Retrieve, Infer, Apply 1. How do microorganisms...Ch. 7.5 - Retrieve, Infer, Apply 2. Define water activity...Ch. 7.5 - Prob. 1.3CCCh. 7.5 - Retrieve, Infer, Apply 1. Define pH, acidophile,...Ch. 7.5 - Retrieve, Infer, Apply Classify each of the...Ch. 7.5 - Retrieve, Infer, Apply 3. Describe the mechanisms...Ch. 7.5 - Retrieve, Infer, Apply 1. What are cardinal...Ch. 7.5 - Prob. 3.2CCCh. 7.5 - Prob. 3.3CCCh. 7.5 - Prob. 3.4CCCh. 7.5 - Retrieve, Infer, Apply Describe the five types of...Ch. 7.5 - Retrieve, Infer, Apply What are the toxic effects...Ch. 7.5 - Retrieve, Infer, Apply Where would you expect to...Ch. 7.5 - Retrieve, Infer, Apply List the types of...Ch. 7.5 - Prob. 5.3CCCh. 7.5 - Prob. 5.4CCCh. 7.6 - MICRO INQUIRY What biomolecules make up the...Ch. 7.6 - Prob. 1CCCh. 7.6 - Prob. 2CCCh. 7.6 - Prob. 3CCCh. 7.6 - Retrieve, Infer, Apply What is quorum sensing?...Ch. 7.6 - Retrieve, Infer, Apply How is the communication...Ch. 7.7 - Prob. 1CCCh. 7.7 - What are peptones, yeast extract, beef extract,...Ch. 7.7 - Retrieve, Infer, Apply Describe four ways in which...Ch. 7.7 - What are pure cultures and why are they important?...Ch. 7.7 - Retrieve, Infer, Apply It is known that microbial...Ch. 7.7 - Retrieve, Infer, Apply How might an enrichment...Ch. 7.8 - Why is it important to have no more than about 250...Ch. 7.8 - Briefly describe each technique by which microbial...Ch. 7.8 - Prob. 2CCCh. 7.8 - Prob. 3CCCh. 7.8 - For each of the following, which enumeration...Ch. 7.9 - Prob. 1MICh. 7.9 - Prob. 1CCCh. 7.9 - Prob. 2CCCh. 7.9 - Prob. 3CCCh. 7 - Prob. 1RCCh. 7 - Prob. 2RCCh. 7 - Prob. 3RCCh. 7 - Prob. 4RCCh. 7 - Prob. 5RCCh. 7 - Prob. 6RCCh. 7 - As an alternative to diffusible signals, suggest...Ch. 7 - If you wished to obtain a pure culture of bacteria...Ch. 7 - Prob. 3ALCh. 7 - Suggest one specific mechanism underlying the...Ch. 7 - Consider cell-cell communication: bacteria that...Ch. 7 - Suppose you discovered a new bacterial strain from...Ch. 7 - Prob. 7ALCh. 7 - Prob. 8ALCh. 7 - Prob. 9AL
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- The antibiotic kanamycin binds to the small ribosomal subunit of bacteria and interferes with protein synthesis, and the diphtheria toxin binds to the eukaryotic elongation factor EF2 and prevents translocation of the ribosome during protein synthesis. Suppose that an archaeobacterial infection is detected in a person. Could kanamycin and diphtheria toxin be used for treatment of the infection? Why?arrow_forward. The endosymbiotic hypothesis for the origin of mitochondria from gram-negative prokaryotes is supported by all of the following lines of evidence except: A. the presence of enzymes for the Krebs cycle, electron transport, and oxidative phosphorylation the presence of mRNA, tRNA, and rRNA similar to that of the a-proteobacteria the presence of 80s ribosomes, consisting of 40s and 60s ribosomal subunits the presence of circular DNA resembling that of aerobic proteobacteria their use of binary fission rather than mitosis during cell divisionarrow_forwardCompare the sizes and coding capacity of prokaryoticgenomes with those of eukaryotes. What other featuresdistinguish them?arrow_forward
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