1|Page
MICROBIOLOGY EXAM QUESTIONS AND
ANSWERS 2025
Microorganism - .....ANSWER... ✔✔ are organisms
that are too small to see with the unaided eye
examples of microorganisms - .....ANSWER... ✔✔
bacteria
fungi
protozoa
microscopic algae
viruses
what kind of microscope do you use when you are
working with microorganisms you can't see? -
.....ANSWER... ✔✔ bright field microscope
what are the different magnifications of a bright field
microscope - .....ANSWER... ✔✔ 4x
10x
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40x
100x
what is the kind of microscope that you use when looking
at a virus - .....ANSWER... ✔✔ electron microscope
what are the different magnifications of the electron
microscope - .....ANSWER... ✔✔ 1 mil
2 mil
10 mil
How are microbes helpful - .....ANSWER... ✔✔
decompose organic waste
generate O2
produce chemical products such as ethanol and others
produce fermented foods ex: vinegar, cheese, and
bread
produce products used in manufacturing ex: cellulose
and insulin
How many microbes are pathogenic out of all the
microorganisms - .....ANSWER... ✔✔ 70/10 mil
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what knowledge do microbes give humans -
.....ANSWER... ✔✔ prevent diseases
allow food storage and prevent food spoilages
stop transmission of diseases
Microbiology - .....ANSWER... ✔✔ the study of
organisms too small to be seen with the naked eye
microbial ecology - .....ANSWER... ✔✔ the study of
the relationship between microorganisms and their
environment
competitive exclusion - .....ANSWER... ✔✔ a way to
kill the bad bacteria
- change in the pH
- secrete enzymes
- eat the food
bioremediation - .....ANSWER... ✔✔ using microbes to
clean up pollutants
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Bacillus thuringienisis - .....ANSWER... ✔✔ can kill
insects but doesn't harm plants or animals
Order of the Scientific Method - .....ANSWER... ✔✔
observe
hypothesis
prediction
experiment
consistency
theory
law
Mycology - .....ANSWER... ✔✔ study of fungi
bacteriology - .....ANSWER... ✔✔ study of bacteria
virology - .....ANSWER... ✔✔ study of viruses
algology - .....ANSWER... ✔✔ study of algae
protozoology - .....ANSWER... ✔✔ study of protozoa
MICROBIOLOGY EXAM QUESTIONS AND
ANSWERS 2025
Microorganism - .....ANSWER... ✔✔ are organisms
that are too small to see with the unaided eye
examples of microorganisms - .....ANSWER... ✔✔
bacteria
fungi
protozoa
microscopic algae
viruses
what kind of microscope do you use when you are
working with microorganisms you can't see? -
.....ANSWER... ✔✔ bright field microscope
what are the different magnifications of a bright field
microscope - .....ANSWER... ✔✔ 4x
10x
,2|Page
40x
100x
what is the kind of microscope that you use when looking
at a virus - .....ANSWER... ✔✔ electron microscope
what are the different magnifications of the electron
microscope - .....ANSWER... ✔✔ 1 mil
2 mil
10 mil
How are microbes helpful - .....ANSWER... ✔✔
decompose organic waste
generate O2
produce chemical products such as ethanol and others
produce fermented foods ex: vinegar, cheese, and
bread
produce products used in manufacturing ex: cellulose
and insulin
How many microbes are pathogenic out of all the
microorganisms - .....ANSWER... ✔✔ 70/10 mil
,3|Page
what knowledge do microbes give humans -
.....ANSWER... ✔✔ prevent diseases
allow food storage and prevent food spoilages
stop transmission of diseases
Microbiology - .....ANSWER... ✔✔ the study of
organisms too small to be seen with the naked eye
microbial ecology - .....ANSWER... ✔✔ the study of
the relationship between microorganisms and their
environment
competitive exclusion - .....ANSWER... ✔✔ a way to
kill the bad bacteria
- change in the pH
- secrete enzymes
- eat the food
bioremediation - .....ANSWER... ✔✔ using microbes to
clean up pollutants
, 4|Page
Bacillus thuringienisis - .....ANSWER... ✔✔ can kill
insects but doesn't harm plants or animals
Order of the Scientific Method - .....ANSWER... ✔✔
observe
hypothesis
prediction
experiment
consistency
theory
law
Mycology - .....ANSWER... ✔✔ study of fungi
bacteriology - .....ANSWER... ✔✔ study of bacteria
virology - .....ANSWER... ✔✔ study of viruses
algology - .....ANSWER... ✔✔ study of algae
protozoology - .....ANSWER... ✔✔ study of protozoa
