Question 1

A(n)(culture/specimen/inoculum)is a sample of microorganisms introduced into a growth medium.

Accepted Answer

The answer of A(n)(culture/specimen/inoculum)is a sample of microorganisms introduced into...

Question 2

A(n)(autotroph/lithotroph/organotroph)uses inorganic molecules as electron donors.

Accepted Answer

The answer of A(n)(autotroph/lithotroph/organotroph)uses inorganic molecules as electron donors....

Question 3

A growth curve plots the (concentration/number/percentage)of viable organisms in a growing population over time.

Accepted Answer

The answer of A growth curve plots the (concentration/number/percentage)of viable...

Question 4

Nitrogen is a growth-limiting nutrient for many organisms because

Accepted Answer

A)  it is necessary for the biosynthesis of amino acids. 
B)  it is required for synthesis of nucleotides. 
C)  it is required for lipid synthesis. 
D)  only a small number of bacteria are able to extract it from the atmosphere. 
E)  only a few microbes can extract it from the atmosphere, but all organisms require it for amino acid and nucleotide synthesis. 
A)  it is necessary for the biosynthesis of amino acids. 
B)  it is required for synthesis of nucleotides. 
C)  it is required for lipid synthesis. 
D)  only a small number of bacteria are able to extract it from the atmosphere. 
E)  only a few microbes can extract it from the atmosphere, but all organisms require it for amino acid and nucleotide synthesis.

Question 5

The (peroxide/superoxide/hydroxyl)radical is formed during the incomplete reduction of O2 during electron transport in aerobes.

Accepted Answer

The answer of The (peroxide/superoxide/hydroxyl)radical is formed during the incomplete...

Question 6

Which of the following organisms would be most likely to contaminate a jar of pickles?

Accepted Answer

A)  a neutrophile 
B)  a thermophile 
C)  an acidophile 
D)  an obligate anaerobe 
E)  a mesophile 
A)  a neutrophile 
B)  a thermophile 
C)  an acidophile 
D)  an obligate anaerobe 
E)  a mesophile

Question 7

The generation time of bacterial cells is shortest during the ________ phase.

Accepted Answer

A)  death 
B)  lag 
C)  log 
D)  stationary 
E)  longitudinal 
A)  death 
B)  lag 
C)  log 
D)  stationary 
E)  longitudinal

Question 8

A clinical sample from a mucus membrane is usually collected as a (biopsy/needle/swab)specimen.

Accepted Answer

The answer of A clinical sample from a mucus membrane...

Question 9

Creating conditions in the laboratory that promote the growth of some microbes while inhibiting the growth of others is called

Accepted Answer

A)  complex culturing. 
B)  reducing conditions. 
C)  enrichment culturing. 
D)  transport conditions. 
E)  differential culturing. 
A)  complex culturing. 
B)  reducing conditions. 
C)  enrichment culturing. 
D)  transport conditions. 
E)  differential culturing.

Question 10

Agar is a useful compound in the microbiology lab because it is an excellent nutrient for bacteria.

Accepted Answer

A) True 
 B)False

Question 11

Alkalinophiles can survive in water up to pH (11.5/10/7.0).

Accepted Answer

The answer of Alkalinophiles can survive in water up to...

Question 12

Nitrogen fixation results in the production of atmospheric nitrogen gas (N2).

Accepted Answer

A) True 
 B)False

Question 13

Quorum sensing is involved in the development and propagation of a biofilm.

Accepted Answer

A) True 
 B)False

Question 14

The method of obtaining isolated cultures that utilizes surface area to physically dilute specimens is called

Accepted Answer

A)  the pour-plate technique. 
B)  serial dilution. 
C)  the streak-plate technique. 
D)  transport media. 
E)  enrichment culturing. 
A)  the pour-plate technique. 
B)  serial dilution. 
C)  the streak-plate technique. 
D)  transport media. 
E)  enrichment culturing.

Question 15

Obligate anaerobes have enzymes such as superoxide dismutase to protect them from the damaging effects of oxygen.

Accepted Answer

A) True 
 B)False

Question 16

Explain how temperature and pH levels can influence microbial infections in the human body.

Accepted Answer

All microbes have particular ranges of t

Question 17

A 0.1 ml sample of a log phase culture contains 10,000 bacterial cells/ml.It is added to 9.9 ml of fresh culture medium broth.Assume a generation time of 30 minutes,and no limiting nutrients.How many bacteria will be present in the entire broth culture after five hours?

Accepted Answer

A)  3.2 × 104 
B)  5.0 × 105 
C)  1.02 × 106 
D)  6.0 × 106 
E)  2.56 × 107 
A)  3.2 × 104 
B)  5.0 × 105 
C)  1.02 × 106 
D)  6.0 × 106 
E)  2.56 × 107

Question 18

Differential media are not useful for isolation of microbes.

Accepted Answer

A) True 
 B)False

Question 19

Thermoduric mesophiles are often responsible for spoilage of improperly canned foods.

Accepted Answer

A) True 
 B)False

Question 20

A pure culture is composed of cells that arise from a single (cell/inoculum/sample).

Accepted Answer

The answer of A pure culture is composed of cells...

Exam 6: Microbial Nutrition and Growth

A(n)(culture/specimen/inoculum)is a sample of microorganisms introduced into a growth medium.

A(n)(autotroph/lithotroph/organotroph)uses inorganic molecules as electron donors.

A growth curve plots the (concentration/number/percentage)of viable organisms in a growing population over time.

Nitrogen is a growth-limiting nutrient for many organisms because

The (peroxide/superoxide/hydroxyl)radical is formed during the incomplete reduction of O2 during electron transport in aerobes.

Which of the following organisms would be most likely to contaminate a jar of pickles?

The generation time of bacterial cells is shortest during the ________ phase.

A clinical sample from a mucus membrane is usually collected as a (biopsy/needle/swab)specimen.

Creating conditions in the laboratory that promote the growth of some microbes while inhibiting the growth of others is called

Agar is a useful compound in the microbiology lab because it is an excellent nutrient for bacteria.

Alkalinophiles can survive in water up to pH (11.5/10/7.0).

Nitrogen fixation results in the production of atmospheric nitrogen gas (N2).

Quorum sensing is involved in the development and propagation of a biofilm.

The method of obtaining isolated cultures that utilizes surface area to physically dilute specimens is called

Obligate anaerobes have enzymes such as superoxide dismutase to protect them from the damaging effects of oxygen.

Explain how temperature and pH levels can influence microbial infections in the human body.

A 0.1 ml sample of a log phase culture contains 10,000 bacterial cells/ml.It is added to 9.9 ml of fresh culture medium broth.Assume a generation time of 30 minutes,and no limiting nutrients.How many bacteria will be present in the entire broth culture after five hours?

Differential media are not useful for isolation of microbes.

Thermoduric mesophiles are often responsible for spoilage of improperly canned foods.

A pure culture is composed of cells that arise from a single (cell/inoculum/sample).

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Genetics

Recombinant DNA Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Immune Disorders

Pathogenic Gram Positive Bacteria

Pathogenic Gram-Negative Cocci and Bacilli

Rickettsias, Chlamydias, Spirochetes, and Vibrios

Pathogenic Fungi

Parasitic Protozoa, Helminths, and Arthropod Vectors

Pathogenic DNA Viruses

Pathogenic RNA Viruses

Applied and Environmental Microbiology

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