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WorksheetsMICRO_LEC_003_TAXONOMY
Total questions: 23
Worksheet time: 6mins
Name
Class
Date
1.
Microbial concentrations can be measured in terms of?
a)
Cell concentration
b)
Cell density
c)
Biomass concentration
d)
A and C
2.
Time it takes for a cell to divide and the population to double?
a)
Growth rate
b)
Generation time
c)
Incubation time
d)
Reproduction time
3.
A phase that represents a period during which cells, depleted of metabolites and enzymes.
a)
A. Exponential phase
b)
B. Lag phase
c)
C. Stationary phase
d)
D. Death phase
4.
Also known as the plateau phase, the exhaustion of nutrients or the accumulation of toxic products causes growth to cease completely.
a)
A. Exponential phase
b)
B. Lag phase
c)
C. Stationary phase
d)
D. Death phase
5.
Potential Importance of Growth Curve except.
a)
Implications in microbial control, infection, food microbiology, and culture technology.
b)
Growth patterns in microorganisms can account for the stages of infection.
c)
Understanding the stages of cell growth is crucial for working with cultures.
d)
Closed batch culturing is efficient, and must not use a chemostat or continuous culture system.
6.
A device that consist of culture vessel equipped with an overflow siphon and a mechanism for dripping in fresh medium from a reservoir at a regulated rate.
a)
Chemostat
b)
Inoculum
c)
Cell counter
d)
Vitek
7.
This growth pattern begins by a single bacterium nucleating a surface followed by replicating themselves or recruiting other bacteria into a forming colony
a)
Plaque
b)
Biofilm
c)
Spores
d)
Hyphae
8.
A defined process used to render a surface or product free from viable organisms, including bacterial spores.
a)
Bacteriostatic
b)
Bactericidal
c)
Sterilization
d)
Disinfection
9.
A biocide or product that destroys or inhibits the growth of microorganisms in or on living tissue or biologic fluids.
a)
Antiseptic
b)
Disinfectant
c)
Bactericidal
d)
Aseptic
10.
Antimicrobial agents’ mode of actions except.
a)
Damage to RNA
b)
Disruption of Free Sulfhydryl Groups
c)
Denaturation
d)
Disruption of the Cell Membrane or Wall
11.
A chemical or physical agent, usually broad spectrum, that inactivates microorganisms.
a)
Biocides
b)
Bactericidal
c)
Bacteriostatic
d)
Sterilization
12.
Work by concentrating at the cell membrane and dissolving lipids in the cell walls and membranes.
a)
Quaternary Ammonium Compounds
b)
Halogen-Releasing Agents
c)
Bisphenols
d)
Vapor-Phase Sterilants
13.
Source of metabolic energy except.
a)
Fermentation
b)
Respiration
c)
Photosynthesis
d)
ATP
14.
Mesophilic is pathogenic to humans.
a)
true
b)
false
15.
Halophiles are osmophiles that love high sugar.
a)
true
b)
false
16.
Plasmids are isolated from an isolated bacterium and separated by agarose gel electrophoresis to determine their number and size
a)
RESTRICTION FRAGMENT analysis
b)
Genomic analysis
c)
Plasmid profile analysis
d)
Repetitive sequence analysis
17.
MacConkey Agar as well as Colistin Nalidixic Acid agar are an example of what media?
a)
Non selective
b)
Selective
c)
Differential
d)
None of the above
18.
True or False. In binomial nomenclature, the first letter of the Specie is always capitalized.
a)
true
b)
false
19.
The following are characteristics of an exteremeophile except:
a)
It has peptidoglycan cell wall—it lacks peptidoglycan cell wall
b)
Aerobic
c)
diglycerol tetraether lipids
d)
chemolithorophs
20.
This eubacteria do not synthesize precursors of peptidoglycan, and is enclosed in a unit membrane.
a)
Gram-Positive Eubacteria
b)
Gram-Negative Eubacteria
c)
Eubacteria Lacking cell wall
d)
None of the above
21.
Reproduction of Gram-Negative Eubacteria is by ______
a)
Binary fission
b)
Budding
c)
Both
d)
None
22.
True or False. The role of Taxonomy in diagnostic microbiology is to establish and maintain records of key characteristics of clinically relevant microorganisms.
a)
true
b)
false
23.
All are true about the classification of taxonomy except
a)
Experimental and observational techniques are required for taxonomic classification.
b)
Species are collection of bacterial strains that share physiological and genetic features and differ notably from other microbial species.
c)
Biotype is a group of the same species with different characteristic genetic make-up that displays differential physiologic characteristics.
d)
The method for organizing microorganisms into groups or taxa is based on similar morphologic, physiologic, and genetic traits.
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