BIOD 171 ESSENTIAL MICROBIOLOGY
MODULES 1 TO 6 EXAM 2026 QUESTIONS
WITH ANSWERS GRADED A+
◉ 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
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
◉ 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
◉ 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
MODULES 1 TO 6 EXAM 2026 QUESTIONS
WITH ANSWERS GRADED A+
◉ 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
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
◉ 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
◉ 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
