Microbiology: An Introduction, Books a la Carte Plus Mastering Microbiology with Pearson eText -- Access Card Package (13th Edition)
13th Edition
ISBN: 9780134729336
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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Which of the following antimicrobic modes of action would be the most selectively toxic?
A. Inhibiting DNA replication
B. Inhibiting RNA synthesis
C. Preventing cell wall synthesis
D. Disrupting cell membrane function
Which of the following modes of action would be most selectively toxic?a. interrupting ribosomal functionb. dissolving the cell membranec. preventing cell wall synthesisd. inhibiting DNA replication
was used by Joseph Lister to clean wounds and surgical instruments: A.Antibiotics
b.Chlorine water Carbonic acid dAntitoxins
e. Carbolic acid
Which one of the following does not apply to the bacterial glycocalyx?
It is not responsible for virulency
b .It allows the organism to resist drying
C. It may allow an organism to resist phagocytosis
d.It is composed of carbohydrates
E. It is enclosed by the cell wall
Chapter 20 Solutions
Microbiology: An Introduction, Books a la Carte Plus Mastering Microbiology with Pearson eText -- Access Card Package (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_forwardChoose the combination of answers that most accurately completes the statement.Which of the following modes of action would be most selectively toxic? a. interrupting ribosomal function b. dissolving the cell membrane c. preventing cell wall synthesis d. inhibiting DNA replicationarrow_forward
- Dicloxacillin inhibits peptidoglycan synthesis. Which of the following microorganisms would you expect to be susceptible to (killed or inhibited by) dicloxacillin? ments O A. Saccharomyces cerevisiae – a yeast O B. Staphylococcus aureus – a bacterium O C. norovirus O D. green algaearrow_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_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
- Which 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_forwardGlycerol Yeast extract agar (abbreviated GYA or GYEA) is used to promote the growth of A. Actinomycetes B. mold/fungi C. Bacteria D. yeast Is the answer is A or D?arrow_forwardMacConkey (MAC) Agar is used to isolate gram-negative enteric bacteria.Peptone provides nutrients necessary for growth.Bile salts and crystal violet inhibit the growth of gram positive bacteria.Lactose is a carbohydrate. When metabolized, colonies turn the medium pink.Which organism/s will grow in the medium? a. Escherichia coli b. Pseudomonas aeruginosa c. Staphylococcus aureus d. Escherichia coli & Pseudomonas aeruginosa e. Pseudomonas aeruginosa & Staphylococcus aureusarrow_forward
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