Microbiology: A Systems Approach
5th Edition
ISBN: 9781259706615
Author: Marjorie Kelly Cowan Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 7, Problem 3MCQ
Chemoautotrophs can survive on ______ alone.
- a. minerals
- b. CO2
- c. minerals and CO2
- d. methane
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Methanogens are classified as ____.
a.
chemoautotrophs
b.
photoautotrophs
c.
photoheterotrophs
d.
chemoheterotrophs
e.
chemotrophs
Chlorinating swimming pools is an example of______________ to control microbial populations.
A. employing halogens
B. employing heavy metals
C. employing surfactants
4. Most human pathogens are ______ with regard to temperature range of tolerance for optimum growth. *
A. thermophiles
B. mesophiles
C. psychrophiles
D. xerophiles
5. Which adaptations are developed by thermophiles to withstand extremely high temperature? Check all that apply. *
( ) high proportion of unsaturated fatty acids in the cell membrane
( ) high cytosine-guanine nitrogenous bases
( ) more saturated fatty acids in cytoplasmic membrane
( ) heat-stable enzymes
6. Which microbial group has relatively low moisture requirement for cell metabolism and growth? *
A. actinomycetes
B. fungi
C. bacteria
D. protozoa
7. How much oxygen gas (O2) must be present in a microenvironment for the microaerophilic microorganisms to grow at optimum? *
A. 21% oxygen gas (1 atmosphere)
B. completely absent
C. minimal amount
D. abundance or absence of O2 does not matter
8. Which microbial group can't survive in the presence of oxygen gas (O2)? *
A. obligate aerobes
B. facultative…
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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- These enzymes require a temperature of 15 degree Celsius or lower needed for growth / optimal activity.* A.Thermophiles B. Cryophiles C. Halophiles D. Piezophilesarrow_forwardAn apoenzyme is where the _______ is located.a. cofactor b. coenzyme c. redox reaction d. active sitearrow_forwardAn organism that can synthesize all its required organic componentsfrom CO2 using energy from the sun is aa. photoautotroph b. photoheterotroph c. chemoautotroph d. chemoheterotropharrow_forward
- These enzymes require a temperature of 15 degree Celsius or lower needed for growth / optimal activity. * (Please choose one correct answer only) A. Thermophiles B. Cryophiles C. Halophiles D. Piezophilesarrow_forwardHalophiles are organisms that require________. a. a salt concentration of at least 0.2 M b. high sugar concentration c. the addition of halogens d. all of the abovearrow_forwardBiogas is produced as a result of which of the following Process? a. Decomposition b. Conduction c. Burning d. Digestionarrow_forward
- Organisms that can make their own food using inorganic molecules are called: a. autotrophs b. heterotrophs c. photoautotrophs d. chemoautotrophsarrow_forwarddo they consume or produce methane, i am stuck Methanogens _______. Complete the statement to make it true. Group of answer choices are only found in anaerobic habitats thrive in an oxygen rich environment consume methane contribute to the earth's cool temperaturesarrow_forwardType of chlorophyll only found in eukaryotes. a.Chl b b.Chl a c.Chl d d.Chl carrow_forward
- These are enzymes that can sustain in a high hydrostatic pressure. * (Please choose one correct answer only) A. Piezohiles B. Halophiles C. Acidophiles D. Alkaliphiles E. Thermophilesarrow_forwardThe prime source of chlorofluorocarbons is A. Vehicular emissions B. Industrial effluents C. Domestic sewage D. Refrigeration equipmentsarrow_forward4. When organisms die, __________ starts to decay. * a. Nitrogen-14 b. Carbon-14 c. Calcium d. Hydrogenarrow_forward
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