Microbiology Final Exam Newest 2025/2026 Actual Exam
MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL
EXAM COMPLETE 360 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND
NEW VERSION!!
Which of the following is an inhibitor that binds to the active site of an enzyme?
a. a competitive inhibitor
b. a noncompetitive inhibitor
c. an allosteric inhibitor
d. an uncompetitive inhibitor - ANSWER-a. a competitive inhibitor
Which of the following best describes catabolic pathways?
a. They always absorb energy.
b. They break down large molecules into smaller components.
c. They build up large molecules from smaller components.
d. They must be coupled with the breakdown of ATP. - ANSWER-b. They break
down large molecules into smaller components.
Which site on an enzyme is where substrates bind?
a. the activation site
b. the active site
c. the catalyst site
d. the lock and key site - ANSWER-b. the active site
1|Page
, Microbiology Final Exam Newest 2025/2026 Actual Exam
Carotenoids are pigments that are which of the following colors?
a. blue/green
b. green/orange
c. orange/yellow/red
d. purple/blue - ANSWER-c. orange/yellow/red
Which of the following is a pathway that breaks down glucose in some microbes?
a. the Calvin cycle
b. the Entner-Doudoroff pathway
c. the Krebs cycle
d. the tricarboxylic acid cycle - ANSWER-b. the Entner-Doudoroff pathway
Why is the actual ATP yield of aerobic respiration often less than the maximum
possible yield of 38 ATP?
a. Aerobic respiration competes with anaerobic respiration for energy.
b. Aerobic respiration competes with fermentation for energy.
c. In eukaryotes, energy is used to move molecules across membranes.
d. No organisms complete all parts of aerobic respiration. - ANSWER-c. In
eukaryotes, energy is used to move molecules across membranes.
Oxygen is necessary for an electron transport chain to function.
a. True
b. False - ANSWER-b. False
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, Microbiology Final Exam Newest 2025/2026 Actual Exam
Which of the following are enzymes that break down proteins?
a. amylases
b. oxidases
c. oxygenases
d. proteases - ANSWER-d. proteases
E. coli can be distinguished from some if its close gram-negative relatives because
it can ferment lactose.
a. True
b. False - ANSWER-a. True
Which of the following refers to the term metabolism?
a. all the reactions in a cell or organism
b. all the reactions in a cell that break down molecules only
c. all the reactions in a cell that build new molecules only
d. all the reactions in a cell that decompose molecules only - ANSWER-a. all the
reactions in a cell or organism
Which of the following best describes a transition reaction?
a. a reaction that converts pyruvate to acetyl CoA with the release of carbon
dioxide
b. a series of reactions that convert citric acid to oxaloacetate
c. an optional reaction that transports pyruvate into the mitochondrion
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, Microbiology Final Exam Newest 2025/2026 Actual Exam
d. the reaction that converts glucose to glucose-6-phosphate in glycolysis -
ANSWER-a. a reaction that converts pyruvate to acetyl CoA with the release of
carbon dioxide
How can enteropathogenic O157:H7 E. coli strain be recognized from other E. coli
strains?
a. Unlike other E. coli, it cannot ferment lactose.
b. Unlike other E. coli, it cannot ferment mannose.
c. Unlike other E. coli, it cannot ferment pyruvate.
d. Unlike other E. coli, it cannot ferment sorbitol. - ANSWER-d. Unlike other E. coli,
it cannot ferment sorbitol.
Which of the following is not true about the process of fermentation?
a. It can help preserve foods, preventing spoilage.
b. It converts sugars to organic acids, alcohols, and/or gases such as carbon
dioxide.
c. It is carried out exclusively by unicellular eukaryotes such as yeast.
d. It is used to make foods such as cheese and bread. - ANSWER-c. It is carried out
exclusively by unicellular eukaryotes such as yeast.
The guinea worm is best described as which of the following?
a. a helminthic parasite transmitted by consuming contaminated water
b. a type of mold that grows into a worm-like shape and produces antimicrobial
chemicals
c. a type of protist found in water that has not been properly treated
4|Page
MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL
EXAM COMPLETE 360 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND
NEW VERSION!!
Which of the following is an inhibitor that binds to the active site of an enzyme?
a. a competitive inhibitor
b. a noncompetitive inhibitor
c. an allosteric inhibitor
d. an uncompetitive inhibitor - ANSWER-a. a competitive inhibitor
Which of the following best describes catabolic pathways?
a. They always absorb energy.
b. They break down large molecules into smaller components.
c. They build up large molecules from smaller components.
d. They must be coupled with the breakdown of ATP. - ANSWER-b. They break
down large molecules into smaller components.
Which site on an enzyme is where substrates bind?
a. the activation site
b. the active site
c. the catalyst site
d. the lock and key site - ANSWER-b. the active site
1|Page
, Microbiology Final Exam Newest 2025/2026 Actual Exam
Carotenoids are pigments that are which of the following colors?
a. blue/green
b. green/orange
c. orange/yellow/red
d. purple/blue - ANSWER-c. orange/yellow/red
Which of the following is a pathway that breaks down glucose in some microbes?
a. the Calvin cycle
b. the Entner-Doudoroff pathway
c. the Krebs cycle
d. the tricarboxylic acid cycle - ANSWER-b. the Entner-Doudoroff pathway
Why is the actual ATP yield of aerobic respiration often less than the maximum
possible yield of 38 ATP?
a. Aerobic respiration competes with anaerobic respiration for energy.
b. Aerobic respiration competes with fermentation for energy.
c. In eukaryotes, energy is used to move molecules across membranes.
d. No organisms complete all parts of aerobic respiration. - ANSWER-c. In
eukaryotes, energy is used to move molecules across membranes.
Oxygen is necessary for an electron transport chain to function.
a. True
b. False - ANSWER-b. False
2|Page
, Microbiology Final Exam Newest 2025/2026 Actual Exam
Which of the following are enzymes that break down proteins?
a. amylases
b. oxidases
c. oxygenases
d. proteases - ANSWER-d. proteases
E. coli can be distinguished from some if its close gram-negative relatives because
it can ferment lactose.
a. True
b. False - ANSWER-a. True
Which of the following refers to the term metabolism?
a. all the reactions in a cell or organism
b. all the reactions in a cell that break down molecules only
c. all the reactions in a cell that build new molecules only
d. all the reactions in a cell that decompose molecules only - ANSWER-a. all the
reactions in a cell or organism
Which of the following best describes a transition reaction?
a. a reaction that converts pyruvate to acetyl CoA with the release of carbon
dioxide
b. a series of reactions that convert citric acid to oxaloacetate
c. an optional reaction that transports pyruvate into the mitochondrion
3|Page
, Microbiology Final Exam Newest 2025/2026 Actual Exam
d. the reaction that converts glucose to glucose-6-phosphate in glycolysis -
ANSWER-a. a reaction that converts pyruvate to acetyl CoA with the release of
carbon dioxide
How can enteropathogenic O157:H7 E. coli strain be recognized from other E. coli
strains?
a. Unlike other E. coli, it cannot ferment lactose.
b. Unlike other E. coli, it cannot ferment mannose.
c. Unlike other E. coli, it cannot ferment pyruvate.
d. Unlike other E. coli, it cannot ferment sorbitol. - ANSWER-d. Unlike other E. coli,
it cannot ferment sorbitol.
Which of the following is not true about the process of fermentation?
a. It can help preserve foods, preventing spoilage.
b. It converts sugars to organic acids, alcohols, and/or gases such as carbon
dioxide.
c. It is carried out exclusively by unicellular eukaryotes such as yeast.
d. It is used to make foods such as cheese and bread. - ANSWER-c. It is carried out
exclusively by unicellular eukaryotes such as yeast.
The guinea worm is best described as which of the following?
a. a helminthic parasite transmitted by consuming contaminated water
b. a type of mold that grows into a worm-like shape and produces antimicrobial
chemicals
c. a type of protist found in water that has not been properly treated
4|Page
