MICROBIOLOGY TEST EXAM 2025 WITH 100% CORRECT
ANSWERS
D -ANSWER-Which of the following is a eukaryotic domain in the three-domain system?
A. Archaea
B. Fungi
C. Bacteria
D. Eukarya
A -ANSWER-Who was the first to observe microorganisms with a microscope?
A. van Leeuwenhoek
B. Hooke
C. Koch
D. Pasteur
E. None of the above
B -ANSWER-These are the primary molecules making up membranes in cells:
A. Proteins
B. Phospholipids
C. Nucleic acids
D. Carbohydrates
E. None of the above
A -ANSWER-Aerobic respiration differs from anaerobic respiration in which of the following
respects?
A. The final electron acceptors are different
B. Aerobic respiration creates fewer molecules of ATP
C. ANaerobic respiration includes glycolysis
,D. Aerobic respiration requires the electron transport chain
B -ANSWER-Which of the following has to consume carbohydrates for both carbon and
energy?
A. Photoautotroph
B. Chemoheterotroph
C. Chemoautotroph
D. Photoheterotroph
B -ANSWER-salts and sugars work to preserve foods by creating a
A. depletion of nutrients
B. hypertonic environment
C. hypotonic environment
D. lower pH
D -ANSWER-The term facultative anaerobe refers to an organism
A. is killed by oxygen
B. doesnt use oxygen but tolerates it
C. requires less oxygen than is present in air
D. can use oxygen or can grow without oxygen
C -ANSWER-which group of the following bacterial growth types and temperatures is
mismatched?
A. Psychrotroph- optimal growth 22C
B. Psychrophile- optimal growth 12C
C. Thermophile- optimal growth 37C
D. Hyperthermophile- optimal growth 95C
, A -ANSWER-Which group of microorganisms is most likely to spoil a freshwater trout
preserved with salt?
A. Halophiles
B. Psychrophiles
C. Anaerobes
D. Thermophiles
A -ANSWER-Which of the following is a good method to sterilize the interior of dense
materials without using high heat?
A. ionizing radiation
B. Pasteurization
C. autoclave
D. none of the above
B -ANSWER-One important ecosystem function performed by microorganisms (such as algae
and cyanobacteria) is the primary production of biomass through the metabolic process of
A. Anaerobic respiration
B. Photosynthesis
C. Aerobic respiration
D. fermentation
B -ANSWER-The bacteria that are typically present and on the surface of the human body,
and which are typically harmless or even helpful to humans are called the "________"
microbiota
A. endemic
B. normal
C. symptomatic
D. pathogenic
ANSWERS
D -ANSWER-Which of the following is a eukaryotic domain in the three-domain system?
A. Archaea
B. Fungi
C. Bacteria
D. Eukarya
A -ANSWER-Who was the first to observe microorganisms with a microscope?
A. van Leeuwenhoek
B. Hooke
C. Koch
D. Pasteur
E. None of the above
B -ANSWER-These are the primary molecules making up membranes in cells:
A. Proteins
B. Phospholipids
C. Nucleic acids
D. Carbohydrates
E. None of the above
A -ANSWER-Aerobic respiration differs from anaerobic respiration in which of the following
respects?
A. The final electron acceptors are different
B. Aerobic respiration creates fewer molecules of ATP
C. ANaerobic respiration includes glycolysis
,D. Aerobic respiration requires the electron transport chain
B -ANSWER-Which of the following has to consume carbohydrates for both carbon and
energy?
A. Photoautotroph
B. Chemoheterotroph
C. Chemoautotroph
D. Photoheterotroph
B -ANSWER-salts and sugars work to preserve foods by creating a
A. depletion of nutrients
B. hypertonic environment
C. hypotonic environment
D. lower pH
D -ANSWER-The term facultative anaerobe refers to an organism
A. is killed by oxygen
B. doesnt use oxygen but tolerates it
C. requires less oxygen than is present in air
D. can use oxygen or can grow without oxygen
C -ANSWER-which group of the following bacterial growth types and temperatures is
mismatched?
A. Psychrotroph- optimal growth 22C
B. Psychrophile- optimal growth 12C
C. Thermophile- optimal growth 37C
D. Hyperthermophile- optimal growth 95C
, A -ANSWER-Which group of microorganisms is most likely to spoil a freshwater trout
preserved with salt?
A. Halophiles
B. Psychrophiles
C. Anaerobes
D. Thermophiles
A -ANSWER-Which of the following is a good method to sterilize the interior of dense
materials without using high heat?
A. ionizing radiation
B. Pasteurization
C. autoclave
D. none of the above
B -ANSWER-One important ecosystem function performed by microorganisms (such as algae
and cyanobacteria) is the primary production of biomass through the metabolic process of
A. Anaerobic respiration
B. Photosynthesis
C. Aerobic respiration
D. fermentation
B -ANSWER-The bacteria that are typically present and on the surface of the human body,
and which are typically harmless or even helpful to humans are called the "________"
microbiota
A. endemic
B. normal
C. symptomatic
D. pathogenic
