Microbiology: A Systems Approach
5th Edition
ISBN: 9781259706615
Author: Marjorie Kelly Cowan Professor
Publisher: McGraw-Hill Education
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Chapter 7, Problem 8MCQ
Summary Introduction
Introduction:
Psychrophiles are the microorganisms that only thrive below the temperature of
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Select the correct answer from the answers provided. Psychrophiles would be expected to grow a. in hot springs c. at refrigeration temperatures b. on the human body d. at low pH
An acidophile would grow best at a pH of:
A.6 b.2 c.12 d.7 e 9
What is the proper term for an organism whose optimum growth range is between 20 and 50C but can grow well at refrigerator temperatures?
a. psychrophile
b. psychrotroph
c. hypophiles
d. psychrobot
Chapter 7 Solutions
Microbiology: A Systems Approach
Ch. 7.1 - List the essential nutrients of a bacterial cell.Ch. 7.1 - Prob. 2AYPCh. 7.1 - List and define four different terms that describe...Ch. 7.1 - Define saprobe and parasite, and provide microbial...Ch. 7.1 - Prob. 5AYPCh. 7.1 - Identify the effects of isotonic, hypotonic, and...Ch. 7.1 - Name two types of passive transport and three...Ch. 7.2 - List and define five terms used to express a...Ch. 7.2 - Prob. 9AYPCh. 7.2 - Prob. 10AYP
Ch. 7.2 - Prob. 11AYPCh. 7.2 - Discuss characteristics of biofilms that...Ch. 7.3 - Summarize the steps of cell division used by most...Ch. 7.3 - Define doubling time and describe how it leads to...Ch. 7.3 - Compare and contrast the four phases of growth in...Ch. 7.3 - Prob. 16AYPCh. 7 - The source of the necessary elements of life is a....Ch. 7 - An organism that can synthesize all its required...Ch. 7 - Chemoautotrophs can survive on ______ alone. a....Ch. 7 - Prob. 4MCQCh. 7 - Prob. 5MCQCh. 7 - Prob. 6MCQCh. 7 - A cell exposed to a hypertonic environment will...Ch. 7 - Prob. 8MCQCh. 7 - Prob. 9MCQCh. 7 - In a viable plate count, each _____ represents a...Ch. 7 - Prob. 11TFCh. 7 - Prob. 12TFCh. 7 - Prob. 13TFCh. 7 - Prob. 14TFCh. 7 - A facultative anaerobe can grow with or without...Ch. 7 - Prob. 1CTQCh. 7 - Describe the process used by a saprobic microbe to...Ch. 7 - Prob. 3CTQCh. 7 - Explain what is happening to the bacterial...Ch. 7 - Prob. 5CTQCh. 7 - Prob. 1VCCh. 7 - Using the words that follow, please create a...
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- A microbe causing a bloodstream infection is likely all of the following except A. A chemotroph B. A parasite C. A heterotroph D. A thermophilearrow_forwardSelect all of the pathways that can lead to pore production in a microbial cell. A. Alternative B. Lectin C. Classicalarrow_forwardIn what environments might the following organisms be found?a. hyperthermophile b. thermophile c. mesophile d. psychrophilearrow_forward
- An obligate anaerobe A has the necessary enzymes to process toxic oxygen products B does not require oxygen in its metabolism, but can tolerate its presence . C lacks the enzymes necessary for processing toxic oxygen products. D grows in high pressure environments.arrow_forwarda. Name four categories that blood agar fits.b. Name four differential reactions that TSIA shows.c. Observe figure 2 . Suggest what causes the difference in growthpattern between nonmotile and motile bacteria. d.Explain what a medium that is both selective and differential does,using figure1 .arrow_forwardMost bacteriocidal chemical control agents will kill vegetative cells and endospores.a. Tb. Farrow_forward
- Many antibacterial hand soaps contain the chemical agent _____ , which belongs to the _____ antimicrobial category. a. sodium hypochlorite; halogen b. triclosan; phenolic c. sodium chlorite; halogen d. ethanol; alcoholarrow_forwardWhich 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 functionarrow_forwardYou have aseptically inoculated an unknown organism on a blood agar plate. You return 48 hours later and the agar is no longer red and opaque but now is yellow and transparent where the bacteria has grown. You conclude your organism exhibits... A. Alpha hemolysis B. Gamma hemolysis C. Beta hemolysis D. No lysisarrow_forward
- Why does secondary treatment of wastewater require O2? A. Secondary treatment relies on anaerobic microbes to oxidize organic material. B.Secondary treatment relies on anaerobic microbes to reduce organic material. C.Secondary treatment relies on aerobic microbes to oxidize organic material. D.Photosynthetic bacteria are involved in secondary treatment and they require O2. E. Flocs require oxygen to facilitate biofilm formation.arrow_forwardSecondary metabolites of microbes are formed during thephase of growth.a. exponential b. stationary c. lag d. deatharrow_forwardWhich of the following is NOT a property of an antimicrobial agent? a. Must have a known concentration over a period of time required to eliminate a pathogen b. all choices are correct c. must be selectively toxic d. Must have a favorable chemotherapeutic indexarrow_forward
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