Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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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.
Escherichia coli.
Proteus vulgaris.
Salmonella typhimurium.
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?
3). Why is Salmonellosis associated with eggs? Can you get Salmonellosis from other animal sources?
Why is Phenol red being utilized in MacConkey agar? Choose among the choices and further explain it.A. Inhibit microscopic organismsB. Detect the production of gas by-productsC. Conduct the sulfate reduction testD. Detect the acid reaction of lactose fermentation
Bacteria that are obligate intracellular pathogens of humans are considered to be
Autotrophs
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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.
It elaborates a toxin that suppresses the release of inhibitory neurotransmitters.
It produces a polysaccharide capsule that inhibits phagocytosis and contributes to invasion of the central nervous system.
It elaborates a toxin that inhibits the release of acetylcholine at cholinergic synapses.
It produces a leukotoxin that leads to abscess formation.
Chapter 42 Solutions
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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