MICRO EXAM 2 DR AL LSUE QUESTIONS AND
ANSWERS
The term microaerophilic refers to an organism that - Answers - Requires less oxygen
than is present in the air
A persistent infection is one in which - Answers - The disease process occurs gradually
over a long period
Which of the following form conidiospores? - Answers - Actinomycetes and related
organisms
A media designed to suppress the growth of unwanted bacteria and to encourage
growth of a desired microbe: - Answers - Selective
Streptomyces differs from Actinomyces because Streptomyces - Answers - Is a strict
aerobe
Which of the following is an advantage of the standard plate count? - Answers -
Determines the number of viable cells
Fungi can synthesize all of the following except: - Answers - Vitamin K
Which one of the following bacteria does NOT belong with the others? - Answers -
Staphlyococcus
Consider a culture medium on which only gram-positive organisms such as
Staphylococcus aureus colonies can grow due to an elevated NaCl level. A yellow halo
surrounds the rgc>>mh, indicating the bacterium fermented a sugar in the medium,
decreasing the pH as a result and changing the color of a pH indicator chemical. This
type of medium would be referred to as a(n) - Answers - Selective and differential
medium
The term facultative anaerobe refers to an organism that - Answers - Uses oxygen or
grows without oxygen
The arrangement of organisms into groups is best described as: - Answers -
Classification
Bacteriophages and animal viluses do NOT differ significantly in which one of the
following steps? - Answers - Biosynthesis
, The most widely accepted classification scheme for bacteria is the one found in -
Answers - Berger's Manual of Systemic Bacteriology
Which of the following statements about algae is FALSE? - Answers - All are unicellular
Which of the following lacks a cell wall? - Answers - Mycoplasma
If a fungus lacks the sexual phase (perfect stage) or if this phase has not been
observed, it is placed within the division - Answers - Deuteromycota
Which of the following statements about viral spikes is FALSE? - Answers - They are
found only on nonenveloped viruses
A biochemical test, in the microbiology world, is used to determine - Answers -
Capability of a microbe to perform a specific enzymatic activity
A nutritionally rich media without the EXACT composition being known is called: -
Answers - Complex
Progressive, degenerative diseases in which of the symptoms build slowly over a period
of year are called __ infections - Answers - Slow virus
Yeast infections are caused by - Answers - Candida Albican
Richettsias differ from chlamydias in that richettsias - Answers - Require an arthropod
for transmission
At 9:00 am a closed flask is inoculated with 10,000 cells. At 4:00 pm the culture enters
stationary phase with a population of 1,000,000 cells. The number of generation time
are: - Answers - .....
A microorganism that has an optimum temperature range of 35-37 degree Celsius is
classified as a: - Answers - Mesophile
Flow cytometry, where a cell is passed through a light source such as a laser beam, can
directly indicate all EXCEPT which one of the following about a cell? - Answers - Identify
The mechanism whereby an enveloped virus leaves a host cell is called - Answers -
Budding
Samonella, Shigella, Yersinia, and Pasteurela are out together in Bergey's Manual
because they are all - Answers - Gram-negatice facultatively anaerobic rods
Which of the following is the best evidence for a three-domain system? - Answers -
Nucleotide sequences in ribosomal RNA vary between all three domains
ANSWERS
The term microaerophilic refers to an organism that - Answers - Requires less oxygen
than is present in the air
A persistent infection is one in which - Answers - The disease process occurs gradually
over a long period
Which of the following form conidiospores? - Answers - Actinomycetes and related
organisms
A media designed to suppress the growth of unwanted bacteria and to encourage
growth of a desired microbe: - Answers - Selective
Streptomyces differs from Actinomyces because Streptomyces - Answers - Is a strict
aerobe
Which of the following is an advantage of the standard plate count? - Answers -
Determines the number of viable cells
Fungi can synthesize all of the following except: - Answers - Vitamin K
Which one of the following bacteria does NOT belong with the others? - Answers -
Staphlyococcus
Consider a culture medium on which only gram-positive organisms such as
Staphylococcus aureus colonies can grow due to an elevated NaCl level. A yellow halo
surrounds the rgc>>mh, indicating the bacterium fermented a sugar in the medium,
decreasing the pH as a result and changing the color of a pH indicator chemical. This
type of medium would be referred to as a(n) - Answers - Selective and differential
medium
The term facultative anaerobe refers to an organism that - Answers - Uses oxygen or
grows without oxygen
The arrangement of organisms into groups is best described as: - Answers -
Classification
Bacteriophages and animal viluses do NOT differ significantly in which one of the
following steps? - Answers - Biosynthesis
, The most widely accepted classification scheme for bacteria is the one found in -
Answers - Berger's Manual of Systemic Bacteriology
Which of the following statements about algae is FALSE? - Answers - All are unicellular
Which of the following lacks a cell wall? - Answers - Mycoplasma
If a fungus lacks the sexual phase (perfect stage) or if this phase has not been
observed, it is placed within the division - Answers - Deuteromycota
Which of the following statements about viral spikes is FALSE? - Answers - They are
found only on nonenveloped viruses
A biochemical test, in the microbiology world, is used to determine - Answers -
Capability of a microbe to perform a specific enzymatic activity
A nutritionally rich media without the EXACT composition being known is called: -
Answers - Complex
Progressive, degenerative diseases in which of the symptoms build slowly over a period
of year are called __ infections - Answers - Slow virus
Yeast infections are caused by - Answers - Candida Albican
Richettsias differ from chlamydias in that richettsias - Answers - Require an arthropod
for transmission
At 9:00 am a closed flask is inoculated with 10,000 cells. At 4:00 pm the culture enters
stationary phase with a population of 1,000,000 cells. The number of generation time
are: - Answers - .....
A microorganism that has an optimum temperature range of 35-37 degree Celsius is
classified as a: - Answers - Mesophile
Flow cytometry, where a cell is passed through a light source such as a laser beam, can
directly indicate all EXCEPT which one of the following about a cell? - Answers - Identify
The mechanism whereby an enveloped virus leaves a host cell is called - Answers -
Budding
Samonella, Shigella, Yersinia, and Pasteurela are out together in Bergey's Manual
because they are all - Answers - Gram-negatice facultatively anaerobic rods
Which of the following is the best evidence for a three-domain system? - Answers -
Nucleotide sequences in ribosomal RNA vary between all three domains
