OPENSTAX MICROBIOLOGY TEST BANK
CERTIFICATION SCRIPT 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◍ Bacillus species.
Answer: A genus of bacteria known for its rod-shaped cells and ability to
form spores.
◍ Archaea.
Answer: Very similar to bacteria and have rigid cell walls made of
peptidoglycan.
◍ Bond formed by sharing electrons.
Answer: is a covalent bond.
◍ Viruses terminology.
Answer: Often referred to as infectious agents.
◍ Hospital Acquired Infection.
Answer: Infection acquired during hospital stay, often resistant to treatment.
◍ Bacterial presence in infections.
Answer: They are usually found as single cells.
◍ 10) The death phase applies to individual cells rather than populations..
Answer: False
◍ Bacterial Morphology.
Answer: The study of bacterial shapes and structures.
◍ Biogenesis.
Answer: Theory that living organisms arise from pre-existing life.
◍ Insulin Production.
, Answer: Process of synthesizing insulin, not done by microbiota.
◍ Archaea movement.
Answer: They move using flagella.
◍ The human body.
Answer: contains bacteria even when not ill.
◍ 42) Cultures of a bacterial species were incubated on the shelf of a
refrigerator (5°C), on a lab benchtop (25°C), on the shelf of a 37°C
incubator, and on the shelf of a 50°C incubator. After incubation, there was
no growth at 37°C or 50°C, slight growth on the benchtop, and abundant
growth at refrigeration. What term could be used for this species?A)
HalophileB) MesophileC) AnaerobeD) Psychrophile.
Answer: D) Psychrophile
◍ Tyndall and Cohn's Work.
Answer: Provided explanations for contradictory results in spontaneous
generation experiments.
◍ Cellulose digestion.
Answer: A major component of plants and is only directly digested by
microorganisms.
◍ Antiprotozoan Drug.
Answer: Medication used to treat protozoan infections.
◍ Emerging Infection.
Answer: A disease newly identified or recently increasing in incidence.
◍ Acellular Infectious Agent.
Answer: Pathogen lacking cellular structure, e.g., viruses.
◍ West Nile Virus.
Answer: A virus causing illness primarily in birds, now affecting humans.
◍ 8) Many fungi and bacteria grow best at pH 5 or below..
Answer: True
,◍ Swan-necked Flask.
Answer: Flask design preventing contamination in Pasteur's experiments.
◍ 21) Knowledge of microbial growth patterns is useful in working with the
control of microbialgrowth..
Answer: True
◍ 13) Most mesophilic organisms can grow in a temperature range ofA)
0-15°C.B) 10-20°C.C) 20-45°C.D) 50-65°C..
Answer: C) 20-45°C.
◍ Staphylococcus aureus.
Answer: A bacteria that can cause a range of illnesses, from minor skin
infections to life-threatening diseases.
◍ Flagella.
Answer: Long, whip-like structures for bacterial motility.
◍ Scientific name.
Answer: The scientific name of an organism includes its genus and species.
◍ Patient Diagnosis.
Answer: Identification of illness based on symptoms and tests.
◍ Stereoisomers.
Answer: Molecules with the same formula but different arrangements.
◍ 44) Which is an example of a micronutrient?A) ArginineB) Inorganic
phosphorousC) IronD) Vitamin B12.
Answer: C) Iron
◍ Pasteur's Laboratory Location.
Answer: If located in a stable, results would likely have supported
spontaneous generation.
◍ Bacteria (model organisms).
Answer: are good models to use because they share many
biochemical/physiological properties with more complicated organisms.
, ◍ Animalcules.
Answer: Microorganisms first observed by van Leeuwenhoek.
◍ A new organism that is unicellular and 1 cm long.
Answer: could mean that it had to be in the domain eukarya.
◍ Nucleus.
Answer: Center of an atom containing protons and neutrons.
◍ Pathogen.
Answer: Microorganism causing disease in a host.
◍ First Scientist to See Microorganisms.
Answer: van Leeuwenhoek is usually considered the first to see
microorganisms.
◍ Microorganisms in Food Preparation.
Answer: Microorganisms are involved in preparing food.
◍ Escherichia coli B12.
Answer: Another strain of E. coli, used in various microbiological studies.
◍ Topical Gel.
Answer: External application used to treat skin infections.
◍ 17) Some microbes can grow in boiling water..
Answer: True
◍ Globalization.
Answer: Increased interconnectedness leading to disease spread.
◍ Chemical Composition.
Answer: Analysis of pathogens based on proteins, lipids, DNA, RNA.
◍ Bacteria in food production.
Answer: Bacteria have been used to help produce or modify all of the
following food products EXCEPT peanuts.
◍ 10) The number of colonies obtained in a plate count does NOT depend on
theA) inoculum volume.B) size of the colonies.C) type of culture
CERTIFICATION SCRIPT 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◍ Bacillus species.
Answer: A genus of bacteria known for its rod-shaped cells and ability to
form spores.
◍ Archaea.
Answer: Very similar to bacteria and have rigid cell walls made of
peptidoglycan.
◍ Bond formed by sharing electrons.
Answer: is a covalent bond.
◍ Viruses terminology.
Answer: Often referred to as infectious agents.
◍ Hospital Acquired Infection.
Answer: Infection acquired during hospital stay, often resistant to treatment.
◍ Bacterial presence in infections.
Answer: They are usually found as single cells.
◍ 10) The death phase applies to individual cells rather than populations..
Answer: False
◍ Bacterial Morphology.
Answer: The study of bacterial shapes and structures.
◍ Biogenesis.
Answer: Theory that living organisms arise from pre-existing life.
◍ Insulin Production.
, Answer: Process of synthesizing insulin, not done by microbiota.
◍ Archaea movement.
Answer: They move using flagella.
◍ The human body.
Answer: contains bacteria even when not ill.
◍ 42) Cultures of a bacterial species were incubated on the shelf of a
refrigerator (5°C), on a lab benchtop (25°C), on the shelf of a 37°C
incubator, and on the shelf of a 50°C incubator. After incubation, there was
no growth at 37°C or 50°C, slight growth on the benchtop, and abundant
growth at refrigeration. What term could be used for this species?A)
HalophileB) MesophileC) AnaerobeD) Psychrophile.
Answer: D) Psychrophile
◍ Tyndall and Cohn's Work.
Answer: Provided explanations for contradictory results in spontaneous
generation experiments.
◍ Cellulose digestion.
Answer: A major component of plants and is only directly digested by
microorganisms.
◍ Antiprotozoan Drug.
Answer: Medication used to treat protozoan infections.
◍ Emerging Infection.
Answer: A disease newly identified or recently increasing in incidence.
◍ Acellular Infectious Agent.
Answer: Pathogen lacking cellular structure, e.g., viruses.
◍ West Nile Virus.
Answer: A virus causing illness primarily in birds, now affecting humans.
◍ 8) Many fungi and bacteria grow best at pH 5 or below..
Answer: True
,◍ Swan-necked Flask.
Answer: Flask design preventing contamination in Pasteur's experiments.
◍ 21) Knowledge of microbial growth patterns is useful in working with the
control of microbialgrowth..
Answer: True
◍ 13) Most mesophilic organisms can grow in a temperature range ofA)
0-15°C.B) 10-20°C.C) 20-45°C.D) 50-65°C..
Answer: C) 20-45°C.
◍ Staphylococcus aureus.
Answer: A bacteria that can cause a range of illnesses, from minor skin
infections to life-threatening diseases.
◍ Flagella.
Answer: Long, whip-like structures for bacterial motility.
◍ Scientific name.
Answer: The scientific name of an organism includes its genus and species.
◍ Patient Diagnosis.
Answer: Identification of illness based on symptoms and tests.
◍ Stereoisomers.
Answer: Molecules with the same formula but different arrangements.
◍ 44) Which is an example of a micronutrient?A) ArginineB) Inorganic
phosphorousC) IronD) Vitamin B12.
Answer: C) Iron
◍ Pasteur's Laboratory Location.
Answer: If located in a stable, results would likely have supported
spontaneous generation.
◍ Bacteria (model organisms).
Answer: are good models to use because they share many
biochemical/physiological properties with more complicated organisms.
, ◍ Animalcules.
Answer: Microorganisms first observed by van Leeuwenhoek.
◍ A new organism that is unicellular and 1 cm long.
Answer: could mean that it had to be in the domain eukarya.
◍ Nucleus.
Answer: Center of an atom containing protons and neutrons.
◍ Pathogen.
Answer: Microorganism causing disease in a host.
◍ First Scientist to See Microorganisms.
Answer: van Leeuwenhoek is usually considered the first to see
microorganisms.
◍ Microorganisms in Food Preparation.
Answer: Microorganisms are involved in preparing food.
◍ Escherichia coli B12.
Answer: Another strain of E. coli, used in various microbiological studies.
◍ Topical Gel.
Answer: External application used to treat skin infections.
◍ 17) Some microbes can grow in boiling water..
Answer: True
◍ Globalization.
Answer: Increased interconnectedness leading to disease spread.
◍ Chemical Composition.
Answer: Analysis of pathogens based on proteins, lipids, DNA, RNA.
◍ Bacteria in food production.
Answer: Bacteria have been used to help produce or modify all of the
following food products EXCEPT peanuts.
◍ 10) The number of colonies obtained in a plate count does NOT depend on
theA) inoculum volume.B) size of the colonies.C) type of culture
