UAMS Microbiology Exam 1 QUESTIONS AND VERIFIED ANSWERS
2025(GRADED A+) DETAILED ANSWERS!!
Terms in this set (72)
Coccus
Coccobacillus
Vibrio
Name the different organism
morphologies Bacillus
Spirillu
m
Spiroch
ete
Coccus
diplococcus
staphylococci
Name the bacterial arrangements
streptococci
sarcina
tetrad
Describe a Filamentous Rod A long string of bacillus bacteria
Describe a Fusiform Rod Bacteria that is pointed on the ends
Describe Pleomorphic Rods Different lengths and shapes of the same bacteria
What is the melting and liquid Polysaccharide melts at 100C and stays liquid until 45-50C.
temperatures of agar?
Nutrient Agar The most basic growth media for bacteria. Examples: TSA and Nutrient
Agars
Supplemented with various substances to encourage growth of
Enriched Media
fastidious organisms. Examples: BAP and Chocolate.
Enhance the growth of specific MOs while inhibiting the growth
Enrichment Broths
of others. Examples: GN, Selenite, LIM and Trans-Vag broths.
, No antimicrobial substances and allows growth of most
Nonselective Media
organisms. Examples: BAP and Chocolate.
Contains antimicrobial substances which allows the growth of
Selective Media
specific bacteria while inhibiting the growth of others.
Examples: PEA, CNA, MAC, EMB
Microaerophilic Decreased oxygen (5-10% O2). Example: Campylobacter
Capnophilic Increased CO2 (5-10% CO2) Example: Haemophilus influenza.
Humidophilic Increased humidity (70-80%)
Incinerating Burns and physically destroys MOs
Intermittent Boiling Kills all MOs (3-30 minute intervals of boiling at 100C and cooling kills
endospores)
Autoclaving Steam under pressure (15 psi at 121C for 15 minutes)
Dry Heat Hot air oven (160C for 2 hours)
Destroys and distorts nucleic acids of MOs. Examples: UV lamps,
Irradiation
Gamma radiation, Electron beam radiation.
Filtration Physical removal of bacterial cells from liquids, gases and air. Example:
HEPA filters
Opportunistic Pathogen MOs that can cause disease in compromised patient.
Pathogen MOs which can cause disease in health individuals.
Virulence Pathogenicity of the bacteria.
Protein toxins released from viable
bacteria. Produced by gram negative
Exotoxins
and positive bacteria. Usually
localized and effect a specific cell
type. Inhibit protein synthesis in
human cells.
Released by bacterial
Endotoxins lysis. Gram negative
bacteria only.
Lipid A portion of lipopolysaccaride cell wall is toxic.
True or False: Organisms True
transmitted through aerosols
belong to biosafety level 3 and
above.
What disease can S. epidermidis Endocarditis
and S. lugdunensis cause?
2025(GRADED A+) DETAILED ANSWERS!!
Terms in this set (72)
Coccus
Coccobacillus
Vibrio
Name the different organism
morphologies Bacillus
Spirillu
m
Spiroch
ete
Coccus
diplococcus
staphylococci
Name the bacterial arrangements
streptococci
sarcina
tetrad
Describe a Filamentous Rod A long string of bacillus bacteria
Describe a Fusiform Rod Bacteria that is pointed on the ends
Describe Pleomorphic Rods Different lengths and shapes of the same bacteria
What is the melting and liquid Polysaccharide melts at 100C and stays liquid until 45-50C.
temperatures of agar?
Nutrient Agar The most basic growth media for bacteria. Examples: TSA and Nutrient
Agars
Supplemented with various substances to encourage growth of
Enriched Media
fastidious organisms. Examples: BAP and Chocolate.
Enhance the growth of specific MOs while inhibiting the growth
Enrichment Broths
of others. Examples: GN, Selenite, LIM and Trans-Vag broths.
, No antimicrobial substances and allows growth of most
Nonselective Media
organisms. Examples: BAP and Chocolate.
Contains antimicrobial substances which allows the growth of
Selective Media
specific bacteria while inhibiting the growth of others.
Examples: PEA, CNA, MAC, EMB
Microaerophilic Decreased oxygen (5-10% O2). Example: Campylobacter
Capnophilic Increased CO2 (5-10% CO2) Example: Haemophilus influenza.
Humidophilic Increased humidity (70-80%)
Incinerating Burns and physically destroys MOs
Intermittent Boiling Kills all MOs (3-30 minute intervals of boiling at 100C and cooling kills
endospores)
Autoclaving Steam under pressure (15 psi at 121C for 15 minutes)
Dry Heat Hot air oven (160C for 2 hours)
Destroys and distorts nucleic acids of MOs. Examples: UV lamps,
Irradiation
Gamma radiation, Electron beam radiation.
Filtration Physical removal of bacterial cells from liquids, gases and air. Example:
HEPA filters
Opportunistic Pathogen MOs that can cause disease in compromised patient.
Pathogen MOs which can cause disease in health individuals.
Virulence Pathogenicity of the bacteria.
Protein toxins released from viable
bacteria. Produced by gram negative
Exotoxins
and positive bacteria. Usually
localized and effect a specific cell
type. Inhibit protein synthesis in
human cells.
Released by bacterial
Endotoxins lysis. Gram negative
bacteria only.
Lipid A portion of lipopolysaccaride cell wall is toxic.
True or False: Organisms True
transmitted through aerosols
belong to biosafety level 3 and
above.
What disease can S. epidermidis Endocarditis
and S. lugdunensis cause?
