Nester's Microbiology: A Human Perspective
9th Edition
ISBN: 9781259709999
Author: Denise G. Anderson Lecturer, Sarah Salm, Deborah Allen
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 3, Problem 6SA
Give two reasons why the outer membrane of Gram-negative bacteria is medically significant.
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Gram-negative bacteria are surrounded by two membrane bilayers separated by a space termed the periplasm. The periplasm is a multipurpose compartment separate from the cytoplasm. The periplasm has a distinct oxidizing environment that allow certain key protein structural features to be formed. Can you identify an amino acid(s) that would be affected by this oxidizing environment? How would it be affected, and what structural features would be sensitive to this environment? Can you discuss the implications of this from a standpoint of recombinant protein expression?
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Chapter 3 Solutions
Nester's Microbiology: A Human Perspective
Ch. 3 - Prob. 1SACh. 3 - Describe the difference between a simple stain and...Ch. 3 - Describe what happens at each step in the Gram...Ch. 3 - Compare and contrast ABC transport systems with...Ch. 3 - Diagram the structure of peptidoglycan.Ch. 3 - Give two reasons why the outer membrane of...Ch. 3 - Describe how a plasmid can help a cell.Ch. 3 -
8. How is receptor-mediated endocytosis different...Ch. 3 - What is the endosymbiotic theory?Ch. 3 - Explain how the Golgi apparatus cooperatively...
Ch. 3 - Which of the following is most likely to be used...Ch. 3 - When a medical technologist wants to determine if...Ch. 3 - Vibrio cholerae causes the disease cholera. Based...Ch. 3 -
4. Endotoxin is associated with
a) Gram-positive...Ch. 3 - The "O157" in the name E. coli O157:H7 refers to...Ch. 3 - Eliminating which structure is always deadly to...Ch. 3 - If you interfered with the ability of a Bacillus...Ch. 3 - If a virus mimics a ligand that normally...Ch. 3 -
9. The antibiotic erythromycin prevents protein...Ch. 3 -
10. If a eukaryotic cell were treated with a...Ch. 3 -
1. You are working in a laboratory producing new...Ch. 3 -
2. A research laboratory is investigating...Ch. 3 -
This graph shows facilitated diffusion of a...Ch. 3 - Most medically useful antibiotics interfere with...
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- Bacteria of the genus Mycoplasma are distinguished from other bacterial cells by 1) cell walls composed solely of amino acids. O 2) the absence of a cytoplasmic membrane. O 3) the absence of a cell wall. O 4) Have large capsules. 5) the presence of mycolic acid in their cell walls.arrow_forwardDiseases that involve biofilm-producing bacteria are of serious concern. They are not as easily treated compared with those involving free-floating (or planktonic) bacteria. Explain three reasons why biofilms can be more pathogenic.arrow_forwardMycoplasmas are bacteria that lack cell walls. On the basis of this structural feature, which statement concerning mycoplasmas should be true? They are gram-negative. They are subject to lysis in hypotonic conditions. They lack a cell membrane as well. They should contain less cellulose than do bacteria that possess cell walls. They possess typical prokaryotic flagella.arrow_forward
- Gram-negative bacteria do not have peptidoglycan in their cell walls. True or False?arrow_forwardPseudomonas bacteria have porin proteins, are resistant to the chemical triclosan, and survive and can even multiply in quaternary ammonium compounds. True or False?arrow_forwardWhich of the following statements is a reason why Acid-Fast Bacteria resist the Gram stain a) Because their cell wall architecture varies from both gram-negative and gram-positive bacteria. b) Because they lack the peptidoglycan layer. c) Because they have a thick peptidoglycan layer. d) Because they have a thick layer of fatty acids.arrow_forward
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- Describe the cross - section side view of a Gram - negative cell . Clearly state where the following would be located or write the letters in order of appearance from the outside to the inside . If any of these structures are not present , make sure to leave them out . A ) peptidoglycan ; ( B ) periplasm ; ( C ) porin ; ( D ) LPS ; ( E ) teichoic acids ; ( F ) plasma membrane : ( G ) outer membrane : ( H ) nucleoidarrow_forwardclostridium botulinum is a bacterium usually present in soil that may cause botulism. Briefly explain why one or few cells of a pathogenic bacterium, such as clostridium botulism, by itself typically does not secrete a toxin, despite the species as a whole being characterized as toxin producing.arrow_forwardExplain the following terms lysozyme (bacteria), cellulase (plant cells), chitinase (fungus).arrow_forward
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