Microbiology: A Systems Approach
5th Edition
ISBN: 9781259706615
Author: Marjorie Kelly Cowan Professor
Publisher: McGraw-Hill Education
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Chapter 7, Problem 9MCQ
Summary Introduction
Introduction:
Superoxide ions (antioxidant) are the highly reactive,
Step.1:
Step.2:
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Superoxide ion is toxic to strict anaerobes because they lacka. catalase
b. peroxidase
c. dismutase
d. oxidase
A microbe that does not require oxygen for metabolism but will use it ifavailable is a/ana. microaerophile.b. facultative anaerobe.c. obligate anaerobe.d. aerotolerant anaerobe.e. obligate aerobe.
Which type(s) of organism/s does not produce enzymes needed to breakdown toxic forms of oxygen?
Select all that apply.
a. Obligate aerobes
b. Facultative anaerobes
Oc. Microaerophiles
Od. Aerotolerant anaerobes
De. Obligate anaerobes
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_forwardIn what environments might the following organisms be found?a. hyperthermophile b. thermophile c. mesophile d. psychrophilearrow_forwardorganism which take carbondioxide as a chemical source is known as Select one: a. photoautotrophs b. chemoautotrophs c. chemoheterotrophs d. photoheterotrophsarrow_forward
- An acidophile would grow best at a pH of: A.6 b.2 c.12 d.7 e 9arrow_forwardAn 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_forwardDefine the following terms: a. obligate anaerobe b. aerotolerant anaerobe c. facultative anaerobe d. obligate aerobe e. reactive oxygen speciesarrow_forward
- c) Pasteurization is a technique that uses temperatures of about 72°C to neutralize potential pathogens in foods. a. Justify the effect does this temperature have on the enzymes and cellular metabolism of pathogens. b. Argue why does the heat of pasteurization kill some microorganisms yet fail to affect thermophiles?arrow_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_forwardYour nasal sample showed colonies with a clear halo around them on blood agar. What can you determine based on that observation? a. The organism is a mannitol fermenter b. The organism is able to utilize starch c. The organism is reducing the hemoglobin and damaging the erythrocytes d. The organism is beta-hemolytic e. The organism is unable to use red blood cells as a nutrient sourcearrow_forward
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