Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Chapter 4.3, Problem 1CC
Thus far, homologues of intermediate filaments have not been identified in archaea. Is it likely that they will be identified eventually? Explain your answer.
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You are conducting a study of comparing human, chlamydomonas and Cyanobacteria. Which is a protein found in both chlymydomoans and humans but not in Cyanobacteria. a) mitochondrial receptor protein
b) atp synthase
c) citrate synthase of citric acid cycle
d) ribosome protein
Why do cyanobacteria possess heterocysts?
View Available Hint(s) for Part A
Heterocysts shield the organism's nitrogen fixation enzymes from oxygen.
Heterocysts serve as a primitive nucleus in these bacteria.
Heterocysts are reproductive structures similar to endospores in other bacteria.
Bacterial photosynthetic pigments are located in heterocysts.
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?
Chapter 4 Solutions
Prescott's Microbiology
Ch. 4.1 - Retrieve, Infer, Apply 1. Which cell shapes are...Ch. 4.1 - Retrieve, Infer, Apply 2. Archaea was first...Ch. 4.2 - MICRO INQUIRY How is pseudomurein similar to...Ch. 4.2 - Retrieve, Infer, Apply 1. Identify three features...Ch. 4.2 - Prob. 2CCCh. 4.3 - Thus far, homologues of intermediate filaments...Ch. 4.3 - Retrieve, Infer, Apply 2. Archaea are often...Ch. 4.4 - Retrieve, Infer, Apply 2. What observations about...Ch. 4.4 - Retrieve, Infer, Apply 3. List three aspects of...Ch. 4.4 - Prob. 3CC
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- a) Describe some characteristics and differences between prokaryotic and eukaryotic cells.b) How do the three domains of life differ from one another?c) Two of the organelles in eukaryotes, the mitochondrion and the chloroplast are believed to haveoriginated through a process of symbiosis. Discuss some of the theories of the origins ofmitochondria and chloroplastsarrow_forward1. Why was the great oxygenation event important for mitochondrial development? a) In your own words, define symbiotic. 2. Chloroplasts and mitochondria both contain a circular DNA chromosome, and ribosomes. Why does this evidence support the theory of endosymbiosis as the mechanism for the origin of eukaryotic cells? a) Today, could mitochondria live independently of their eukaryotic cell host? Give two pieces of evidence to support your answer.arrow_forwardWhy is it favorable for protozoa to replicate with schizogony versus using simple mitosis? what are the different scenarios that can occur with regards to bacterial growth within a thioglycolate tube? Explain why certain bacteria require one classification versus a different classification. A botanist has been using betaproteobacteria to grow his herb garden, because betaproteobacteria require little nutrients to grow. His garden does not grow successfully, so he comes to you for help to develop the herb garden. Which class of gram negative bacteria would you suggest and why? Why was the botanist’s original idea not going to work?arrow_forward
- Why are chloroplasts and mitochondria shown as arrows originating from the Bacteria ?arrow_forwardIn the early 1930s, G. F. Gause carried out a series of experiments using two species of ciliated protists (Paramecium), which are single-celled eukaryotic protozoans. The protists were cultured together and separately, with the bacteria being the single food source. The results are shown in the figure below. (a) Based on figure, identify and explain the interaction that is taking place between P. caudatum and P. aurelia. (b) Clam shrimp, a natural predator to P. caudatum, is introduced to the culture containing both P. caudatum and P. aurelia after 24 days. Predict the impact that the clam shrimp will have on the culture and the populations. Justify your prediction.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_forward
- Some archaea have unique phospholipids in their cytoplasmic membrane that A) form a monolayer due to the presence of diglycerol tetraethers. B) form a bilayer due to the presence of sterols. C) form a stable ring structure due to the presence of crenarchaeol. D) form a bilayer due to the presence of phosphatidylethanolamine.arrow_forwardNote : — don't copy in google or bartleby. Plagarize checker will be used. QUESTION : — Why is it necessary for a mitochondrion to have many infoldings ? — What will happen if mitochondrion has few to no infoldings at all ?arrow_forwardWhy does minus end depolymerization lead to a stable number of microtubules but a large fluctuation in their length?arrow_forward
- Some prokaryotes, especially archaea, are capable of living in extreme environments, such as deep-sea vents, where temperatures can reach 80°C (176°F). Few organisms can survive at this temperature. What adaptations might archaea possess that allow them to survive in such extreme heat?arrow_forwardThe synthesis of arginine by Nuerospora was determined by examining a number of mutant strains that were unable to synthesize the compound. Use the table of bacterial growth below to 1) determine the correct sequence of the synthesis pathway and 2) where in the synthesis pathway each mutation interrupts the synthesis. A “+" indicates growth. Nothing added to Succinate Ornithine added Strain Cirtulline Arginine Added added added growth medium Wild Mutant 1 Mutant 2 Mutant 3 Mutant 4arrow_forwardYou got an opportunity to join a professor lab who is working in-vivo model and specifically looking at the dysregulation of mitochondria in liver. He asked you to isolate mitochondria from a Rat liver and placed in an assay medium. Based on the knowledge you gain in this course so far, please answer the following questions: a) Which technique will you use to isolate mitochondria? b) What happens to the pH of the medium when the medium is kept anaerobic? c) What happens when O2-saturated saline is added to the mixture?arrow_forward
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Endosymbiotic Theory; Author: Amoeba Sisters;https://www.youtube.com/watch?v=FGnS-Xk0ZqU;License: Standard Youtube License