Connect With Learnsmart Labs Online Access For Prescott's Microbiology
11th Edition
ISBN: 9781260408997
Author: Joanne Willey
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 42.3, Problem 3CC
Which of the following are secondary metabolites: pyruvate, a secreted amylase, an antibiotic, leucine? What kind of system (fermenter vs. chemostat) would most likely be used for the production of the streptomycete antibiotic streptomycin? Explain your answer.
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1). SIM Tubes and TSI slants turn black if the organism is able to reduce iron compounds. For which organism(s) below would you expect a black reaction? Circle all that apply.
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Alcaligenes faecalis.
Shigella flexneri.
2). If Citrate is a sugar and fermentation generates an acid, why does the BromThymol Blue indicator in the media turn blue and not yellow?
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Which of the following statements best describes the pathogenesis of Clostridium botulinum?
It elaborates an exotoxin that is a lecithinase that causes tissue necrosis.
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It produces a polysaccharide capsule that inhibits phagocytosis and contributes to invasion of the central nervous system.
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Which of the following is not a characteristic of the Enterobacteriaceae?
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Gram-positive rods
Gram-negative rods
Oxidase negative
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Produce acid from glucose
None of the enteric bacteria are human pathogens.
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True
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Media that inhibit the growth of some organisms while encouraging others' growth are referred to as _______ media.
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selective
differential
complex
defined
Media that contain indicators to expose differences between organisms are referred to as ______ media.
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selective
differential
complex
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Which of the following is TRUE of EMB agar?
Choose ALL that apply.
Group of answer choices
It contains lactose
It is selective for Gram-positive microorganisms.
It can differentiate between lactose fermenters from nonfermenters.
It inhibits the growth of Gram-negative bacteria.
It contains mannitol…
Chapter 42 Solutions
Connect With Learnsmart Labs Online Access For Prescott's Microbiology
Ch. 42.1 - Why are the cells first fed lactose and then...Ch. 42.1 - What critical limiting factors are used in the...Ch. 42.1 - Prob. 2CCCh. 42.1 - What kinds of molecular changes result from...Ch. 42.1 - Prob. 4CCCh. 42.2 - Why is there interest in developing alternatives...Ch. 42.2 - What types of microbes are good candidates for the...Ch. 42.3 - What is the objective of the scale-up process and...Ch. 42.3 - What parameters can be monitored in a modern,...Ch. 42.3 - Which of the following are secondary metabolites:...
Ch. 42.4 - Why are modular genes particularly suitable as...Ch. 42.4 - Prob. 2MICh. 42.4 - Prob. 1CCCh. 42.4 - Prob. 2CCCh. 42.4 - What is metabolic engineering? Besides...Ch. 42.4 - What is high-throughput screening and why has it...Ch. 42.4 - Prob. 5CCCh. 42.5 - Prob. 1MICh. 42.5 - What is the Ti plasmid and how is it modified for...Ch. 42.5 - How is Bt toxin produced and why is it so widely...Ch. 42.5 - Prob. 3CCCh. 42.6 - Why are diatoms and magnetotactic bacteria of...Ch. 42.6 - Prob. 2CCCh. 42 - Prob. 1RCCh. 42 - Prob. 2RCCh. 42 - Prob. 3RCCh. 42 - Prob. 4RCCh. 42 - Prob. 5RCCh. 42 - Prob. 6RCCh. 42 - Prob. 7RCCh. 42 - Prob. 1ALCh. 42 - Prob. 2AL
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