BIOL 2421 QUIZZES & EXAMS
QUESTIONS AND ANSWERS
The process of microbial spoilage below is
Proteins + proteolytic microbes -> amino acids + amines + NH3 + H2S - Correct
Answers -putrefaction
What microorganisms contain single-celled and multicellular organisms? - Correct
Answers -algae and fungi
What microorganisms are unicellular with a nucleus and a cell wall made up of chitin? -
Correct Answers -yeast (fungi)
Give the importance of your normal microbiota.
a. they prevent attachment of pathogens
b. they make the environment unfavorable for pathogens to grow
c. they utilize nutrients required by pathogens to grow
d. they produce antimicrobial substances - Correct Answers -a, b, c, & d
Which is the major composition of bacterial cell wall? - Correct Answers -Chitin
What microorganisms are heterotrophs? - Correct Answers -- some bacteria
- all fungi
- all protozoa
What is a prion? - Correct Answers -An infectious agent that is made up of protein only.
Parasitic worms, even meters-long tapeworms, are studied in microbiology because -
Correct Answers -diagnosis usually involves microscopic examination of patient
samples
T/F
Even though viriods and viruses are not made up of cells, they are included in the
microbial world because they cause diseases in humans, animals and plants. - Correct
Answers -true
What describes fungi? - Correct Answers -- All fungi are heterotrophs
- All fungi have cells walls made up of chitin
, Who showed that flasks containing broth made from plant or animal gave rise to
microorganisms even though the broth was heated and the flask was sealed with cork?
- Correct Answers -John T. Needham
You isolated a microorganism from the soil and your analysis shows that the
microorganism is unicellular, no nucleus and its cell wall is not composed of
peptidoglycan. What could be this microorganism? - Correct Answers -Archaea
Which of the following statements describe the microorganisms under domain Archaea
and Bacteria?
a. All of them are unicellular.
b. All of them do not have membrane-enclosed organelles.
c. Some of them can photosynthesize. - Correct Answers -a, b, & c
Which of the following are autotrophs?
a. some bacteria
b. some archaea
c. all algae - Correct Answers -a, b, & c
Pasteur repeated Spallanzani's experiment with modification/s. What is/are the
modifications?
a. He boiled the broth.
b. He bent the neck of the flask.
c. He allowed air to enter the flask.
d. He completely sealed the opening of the flask. - Correct Answers -b and c only
What are the differences between Needham's and Spallanzani's experiments? - Correct
Answers -- Needham briefly heated his broth but Spallanzani heated the broth longer.
- Needham covered his flasks with cork but Spallanzani covered completely his flask by
melting the glass necks.
What are the similarities of yeasts and molds? - Correct Answers -- both are eukaryotic
- both are fungi
- both are heterotrophs
A viroid is a(n) - Correct Answers -infectious piece of RNA without a capsid
Microorganisms such as bacteria are suitable research tools because - Correct Answers
-- Their metabolic and genetic properties are more or less the same with higher forms of
life.
- Bacteria are much easier to study.
QUESTIONS AND ANSWERS
The process of microbial spoilage below is
Proteins + proteolytic microbes -> amino acids + amines + NH3 + H2S - Correct
Answers -putrefaction
What microorganisms contain single-celled and multicellular organisms? - Correct
Answers -algae and fungi
What microorganisms are unicellular with a nucleus and a cell wall made up of chitin? -
Correct Answers -yeast (fungi)
Give the importance of your normal microbiota.
a. they prevent attachment of pathogens
b. they make the environment unfavorable for pathogens to grow
c. they utilize nutrients required by pathogens to grow
d. they produce antimicrobial substances - Correct Answers -a, b, c, & d
Which is the major composition of bacterial cell wall? - Correct Answers -Chitin
What microorganisms are heterotrophs? - Correct Answers -- some bacteria
- all fungi
- all protozoa
What is a prion? - Correct Answers -An infectious agent that is made up of protein only.
Parasitic worms, even meters-long tapeworms, are studied in microbiology because -
Correct Answers -diagnosis usually involves microscopic examination of patient
samples
T/F
Even though viriods and viruses are not made up of cells, they are included in the
microbial world because they cause diseases in humans, animals and plants. - Correct
Answers -true
What describes fungi? - Correct Answers -- All fungi are heterotrophs
- All fungi have cells walls made up of chitin
, Who showed that flasks containing broth made from plant or animal gave rise to
microorganisms even though the broth was heated and the flask was sealed with cork?
- Correct Answers -John T. Needham
You isolated a microorganism from the soil and your analysis shows that the
microorganism is unicellular, no nucleus and its cell wall is not composed of
peptidoglycan. What could be this microorganism? - Correct Answers -Archaea
Which of the following statements describe the microorganisms under domain Archaea
and Bacteria?
a. All of them are unicellular.
b. All of them do not have membrane-enclosed organelles.
c. Some of them can photosynthesize. - Correct Answers -a, b, & c
Which of the following are autotrophs?
a. some bacteria
b. some archaea
c. all algae - Correct Answers -a, b, & c
Pasteur repeated Spallanzani's experiment with modification/s. What is/are the
modifications?
a. He boiled the broth.
b. He bent the neck of the flask.
c. He allowed air to enter the flask.
d. He completely sealed the opening of the flask. - Correct Answers -b and c only
What are the differences between Needham's and Spallanzani's experiments? - Correct
Answers -- Needham briefly heated his broth but Spallanzani heated the broth longer.
- Needham covered his flasks with cork but Spallanzani covered completely his flask by
melting the glass necks.
What are the similarities of yeasts and molds? - Correct Answers -- both are eukaryotic
- both are fungi
- both are heterotrophs
A viroid is a(n) - Correct Answers -infectious piece of RNA without a capsid
Microorganisms such as bacteria are suitable research tools because - Correct Answers
-- Their metabolic and genetic properties are more or less the same with higher forms of
life.
- Bacteria are much easier to study.
