Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Chapter 20, Problem 3MCQ
Summary Introduction
Introduction:
Antimicrobial agents that are used to treat fungal infections are grouped as antifungal drugs. These drugs with a specific mode of action kill pathogenic
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Chapter 20 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 20 - DRAW IT Show where the following antibiotics work:...Ch. 20 - List and explain five criteria used to identify an...Ch. 20 - What similar problems are encountered with...Ch. 20 - Define drug resistance. How is it produced? What...Ch. 20 - List the advantages of using two chemotherapeutic...Ch. 20 - Why does a cell die from the following...Ch. 20 - How does each of the following inhibit...Ch. 20 - The OH is missing from carbon 39 in ddI. How does...Ch. 20 - Compare the method of action of the following...Ch. 20 - NAME IT This microorganism is not susceptible to...
Ch. 20 - Which of the following pairs is mismatched? a....Ch. 20 - Prob. 2MCQCh. 20 - Prob. 3MCQCh. 20 - An antimicrobial agent should meet all of the...Ch. 20 - The most selective antimicrobial activity would be...Ch. 20 - Prob. 6MCQCh. 20 - Which of the following will not affect eukaryotic...Ch. 20 - Cell membrane damage causes death because a. the...Ch. 20 - A drug that intercalates into DNA has the...Ch. 20 - Chloramphenicol binds to the 50S portion of a...Ch. 20 - Prob. 1ACh. 20 - Why is idoxuridine effective if host cells also...Ch. 20 - Some bacteria become resistant to tetracycline...Ch. 20 - The following data were obtained from a...Ch. 20 - Prob. 5ACh. 20 - The following results were obtained from a broth...Ch. 20 - Vancomycin-resistant Enterococcus faecalis was...Ch. 20 - Prob. 2CAECh. 20 - Prob. 3CAE
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- A bacterium has the following characteristics:∙ It adheres to the human intestinal lining using a feature that protects it from phagocytes, bacteriophages, and dehydration∙ It can survive being boiled∙ It contains no plasmids and relatively little peptidoglycanWhich of the following characteristics allows this bacterium to adhere to the intestinal lining? Group of answer choices A. fimbriae B. pili C. an endospore D. a flagellumarrow_forwardWhich of the following is not true or related to bacterial capsule formation A. Rigid and attached tightly to the cell wall B. Loose and weakly associated with bacterial cell wall. C. Capsule formation is associated with virulence of pathogenic bacteria D. Capsule provides resistance to survive through harsh conditionsarrow_forwardAflatoxins, the naturally occurring mycotoxins produced by molds cause DNA mutation by acting as a. acylating agents b. deaminating agents c. intercalating agents d. none of the abovearrow_forward
- 1_Vancomycin inhibits cell wall synthesis by: a.Binding irreversibly to transpeptidase and inhibit cross linking the peptidoglycan chains b.Acting on the final stage of peptidoglycan assembly c.Acting on the enzyme that assembles a growing glycan chain d.Interfering with one of the early stages of synthesis of peptidoglycan Please answer asap and type your answer and do not copy from anywhere please answer should not be palgarisedarrow_forwardWhich of the following statements correctly describes exotoxins and endotoxins produced by various bacteria? A. endotoxins are secreted into the environment while the bacteria are still alive B. exotoxins are secreted into the environment while the bacteria are still alive C. exotoxins are only released into the environment when the bacteria die and their cell walls break down D. exotoxins are components of the outer membrane of the bacteria that produce themarrow_forwardGram negative bacteria lose crystal violet colour after alcohol treatment because of: Select one: a. Thick lipid layer, and thick peptidoglycan layer O b. Thin lipid content, and thin peptidoglycan layer O c. Thick lipid layer, and thin peptidoglycan layer d. Absence of peptidoglycan layer e. Thin lipid layer, and thick peptidoglycan layer Oarrow_forward
- Provide picture of the following microorganisms: 1. a. Cyst form (Early stage) of Escherichia coli b Adult form of Escherichia coli 2. a. Cyst form (Early stage) of Salmonella sp. b Adult form of Salmonella sp. 3. a. Cyst form (Early stage) of Neisseria gonorrhoeae b Adult form of Neisseria gonorrhoeae 4. a. Cyst form (Early stage) of Clostridium tetani b Adult form of Clostridium tetaniarrow_forwardThe bacteria capable of producing dormant bodies devoid of active metabolism, but carry all the genetic material in the vegetative form. a. Pseudomonas and Campylobacter b. Clostridium and Bacillus C. Mycoplasma and Chlamydia d. Streptococcus and Vibrioarrow_forwardWhich of the following cause human food-borne illness: a. Lactobacillus acidophilus b. adding vinegar (acetic acid) to milk c. the botulinum toxin (Bo-tox) made by Clostridia botulinum d. Listeria monocytogenes e. Salmonella entericaarrow_forward
- endotoxins are: a. excreted from within the cell b. specific in their method of actino depending on the particular endotoxin c. associated with gram-positive bacteria d. part of a particular type of cell wall copmosed os lopolusaccharides e. none of the abovearrow_forwardDifferent strains of Streptococcus pyogenes have different virulence factors, giving these microbes much versatility. Virulence factors include which of the following? Choose one or more: A.A capsule that, when thick, will help the organism avoid phagocytosis by macrophages B.A cell wall containing lipoteichoic acid, thought to facilitate adherence to pharyngeal epithelial cells C.Enzymes that lyse blood cells (streptolysins) D.The production of several endotoxins called streptococcal pyogenic endotoxins (SPEs)arrow_forwardAn infectious dose of several million cells in enteric infections seems like a lot. a. In terms of the size and abundance of microbes, could you see a cluster containing that many cells with the naked eye? b. About how long would it take an average bacterial species to reach the infectious dose of a million cells starting from a single cell? c. Why do enteric diseases require a relatively higher infectious dose than nonenteric diseases? d. Explain why antimicrobic therapy used on gram-negative bacterial infections could actually lead to illness rather than cure itarrow_forward
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