Single Space Microbiology quiz 1 bankkk
The term used to describe a disease-causing microorganism is
A) microbe.
B) bacterium.
C) virus.
D) pathogen.
E) infection.
The microbial process of converting sugars to alcohol is known as
A) fermentation.
B) pasteurization.
C) tyndallization.
D) lyophilization.
E) alcoholism.
Microorganisms are involved in each of the following processes EXCEPT
A) infection.
B) decomposition of organic material.
C) O2 production.
D) food production.
E) smog production.
The preservation of beef jerky from microbial growth relies on which method of microbial
control?
A) filtration
B) lyophilization
C) desiccation
D) ionizing radiation
E) supercritical CO2
Desiccation is a reliable form of sterilization.
FALSE
In a hypertonic solution, a bacterial cell will typically
A) lyse.
B) burst.
C) stay the same.
D) plasmolyze.
E) osmolyze.
,Antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a result of
A) osmotic lysis.
B) inhibition of molecular transport.
C) decreased synthesis of plasma membrane.
D) plasmolysis.
E) cell shrinkage.
What will happen if a bacterial cell is pretreated with a lysozyme solution, then placed in
distilled water?
A) The cell will plasmolyze.
B) The cell will undergo osmotic lysis.
C) Water will leave the cell.
D) Lysozyme will diffuse into the cell.
E) No change will result; the solution is isotonic.
Which of the following statements is FALSE?
A) Salts readily dissolve in water.
B) Water molecules are formed by hydrolysis.
C) Water freezes from the top down.
D) Water is formed as a part of a dehydration synthesis reaction.
E) Water is a polar molecule.
Mycology is the study of
A) mycoplasma.
B) mushrooms.
C) protozoa.
D) molds.
E) molds, yeast, and mushrooms.
In microscopy, the term resolution
A) refers to the ability to distinguish fine structure and detail in a specimen.
B) is the same as the total magnification of a specimen.
C) is improved when longer wavelengths of light are employed.
D) is only observed in stained specimens.
E) refers to magnification when using the electron microscope.
A student is looking at a bacterial specimen using the oil immersion lens, but has forgotten to
put immersion oil on the slide. The specimen will appear
A) smaller than it would if immersion oil was used.
B) larger than it would if immersion oil was used.
C) somewhat fuzzy and have poor resolution.
D) the same as it would if the immersion oil was used.
E) to have no color.
, The limit of resolution of the compound microscope illuminated with visible light is
approximately 0.2 μm.
TRUE
Salts and sugars work to preserve foods by creating a
A) depletion of nutrients.
B) hypotonic environment.
C) lower osmotic pressure.
D) hypertonic environment.
E) lower pH.
Cells placed in a hypertonic solution tend to lose water due to osmotic pressure.
TRUE
Application of heat to living cells can result in all of the following EXCEPT
A) breaking of hydrogen bonds.
B) alteration of membrane permeability.
C) denaturation of enzymes.
D) decreased thermal death time.
E) damage to nucleic acids.
Which of the following pairs of microbe classification terms and optimal growth
temperatures is mismatched?
A) psychrotroph – growth at 20-30°C
B) thermophile – growth at 37°C
C) mesophile – growth at 25-40°C
D) psychrophile – growth at 15°C
E) hyperthermophiles – growth at greater than 80°C
Pathogenic bacteria isolated from the respiratory or intestinal tracts of humans are
A) strict aerobes that grow best in candle jars.
B) capnophiles that grow best in carbon dioxide incubators.
C) facultative anaerobes that require reducing media for growth.
D) strict aerobes that grow best in reducing media.
E) capnophiles that prefer highly oxygenated growth conditions.
Microbes that live stably in and on the human body are called the
A) transient microbiota.
B) human microbiome.
C) pathogenic microorganisms.
D) virulent microorganisms.
E) opportunistic microbiota.
The term used to describe a disease-causing microorganism is
A) microbe.
B) bacterium.
C) virus.
D) pathogen.
E) infection.
The microbial process of converting sugars to alcohol is known as
A) fermentation.
B) pasteurization.
C) tyndallization.
D) lyophilization.
E) alcoholism.
Microorganisms are involved in each of the following processes EXCEPT
A) infection.
B) decomposition of organic material.
C) O2 production.
D) food production.
E) smog production.
The preservation of beef jerky from microbial growth relies on which method of microbial
control?
A) filtration
B) lyophilization
C) desiccation
D) ionizing radiation
E) supercritical CO2
Desiccation is a reliable form of sterilization.
FALSE
In a hypertonic solution, a bacterial cell will typically
A) lyse.
B) burst.
C) stay the same.
D) plasmolyze.
E) osmolyze.
,Antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a result of
A) osmotic lysis.
B) inhibition of molecular transport.
C) decreased synthesis of plasma membrane.
D) plasmolysis.
E) cell shrinkage.
What will happen if a bacterial cell is pretreated with a lysozyme solution, then placed in
distilled water?
A) The cell will plasmolyze.
B) The cell will undergo osmotic lysis.
C) Water will leave the cell.
D) Lysozyme will diffuse into the cell.
E) No change will result; the solution is isotonic.
Which of the following statements is FALSE?
A) Salts readily dissolve in water.
B) Water molecules are formed by hydrolysis.
C) Water freezes from the top down.
D) Water is formed as a part of a dehydration synthesis reaction.
E) Water is a polar molecule.
Mycology is the study of
A) mycoplasma.
B) mushrooms.
C) protozoa.
D) molds.
E) molds, yeast, and mushrooms.
In microscopy, the term resolution
A) refers to the ability to distinguish fine structure and detail in a specimen.
B) is the same as the total magnification of a specimen.
C) is improved when longer wavelengths of light are employed.
D) is only observed in stained specimens.
E) refers to magnification when using the electron microscope.
A student is looking at a bacterial specimen using the oil immersion lens, but has forgotten to
put immersion oil on the slide. The specimen will appear
A) smaller than it would if immersion oil was used.
B) larger than it would if immersion oil was used.
C) somewhat fuzzy and have poor resolution.
D) the same as it would if the immersion oil was used.
E) to have no color.
, The limit of resolution of the compound microscope illuminated with visible light is
approximately 0.2 μm.
TRUE
Salts and sugars work to preserve foods by creating a
A) depletion of nutrients.
B) hypotonic environment.
C) lower osmotic pressure.
D) hypertonic environment.
E) lower pH.
Cells placed in a hypertonic solution tend to lose water due to osmotic pressure.
TRUE
Application of heat to living cells can result in all of the following EXCEPT
A) breaking of hydrogen bonds.
B) alteration of membrane permeability.
C) denaturation of enzymes.
D) decreased thermal death time.
E) damage to nucleic acids.
Which of the following pairs of microbe classification terms and optimal growth
temperatures is mismatched?
A) psychrotroph – growth at 20-30°C
B) thermophile – growth at 37°C
C) mesophile – growth at 25-40°C
D) psychrophile – growth at 15°C
E) hyperthermophiles – growth at greater than 80°C
Pathogenic bacteria isolated from the respiratory or intestinal tracts of humans are
A) strict aerobes that grow best in candle jars.
B) capnophiles that grow best in carbon dioxide incubators.
C) facultative anaerobes that require reducing media for growth.
D) strict aerobes that grow best in reducing media.
E) capnophiles that prefer highly oxygenated growth conditions.
Microbes that live stably in and on the human body are called the
A) transient microbiota.
B) human microbiome.
C) pathogenic microorganisms.
D) virulent microorganisms.
E) opportunistic microbiota.
