PORTAGE MICROBIOLOGY EXAM 3
GRADED A ACTUAL TEST PAPER 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
⩥ Mycology. Answer: study of fungi
GRADED A ACTUAL TEST PAPER 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
⩥ Mycology. Answer: study of fungi
