BIMM 120 Midterm 1 (Practice
Questions from Midterm 1 and Quiz
Questions) fully solved
Analysis of DNA sequences reveals
a. the independent evolution of prokaryotes and eukaryotes from different origins.
b. that prokaryotes and eukaryotes evolved from a common ancestor.
c. that bacteria share a common ancestor with archaea but not with eukaryote.
d. that prokaryotes are cells with a nucleus.
e. that the genome of Haemophiles influenzae has about 2 billion base pairs. - correct answer
✔✔ b. that prokaryotes and eukaryotes evolved from a common ancestor.
Which one of the following statements regarding microbial cells is FALSE?
a. Microbial cells acquire food, gain energy to build themselves, and respond to environmental
change.
b. Most single-celled organisms require a microscope to render them visible, but some bacterial
cells are large enough to be seen with naked eyes.
c. Microbes always function as individual entities.
d. Many microbes form complex multicellular assemblages.
e. Viruses are not considered microbial cells - correct answer ✔✔ c. Microbes always function
as individual entities.
Suppose Pasteur's swan-necked flasks containing boiled broth became cloudy twenty-four hours
after boiling. Which choice could best explain the turbidity or cloudiness in the broth without
supporting spontaneous generation?
a. Endospores in the broth survived boiling and grew after the broth cooled.
, b. Contaminating organisms in the broth killed by boiling became alive again after the broth
cooled.
c. Chemicals in the broth came together to form living organisms.
d. The broth allowed light to pass through it with less interference after boiling.
e. Solid material in the broth dissolved during boiling. - correct answer ✔✔ a. Endospores in the
broth survived boiling and grew after the broth cooled.
The use of agar as a more robust gelling agent in solid media
a. allowed the propagation of lithotrophs
b. led to the discovery of viruses
c. allowed the isolation of pure cultures of bacteria
d. led to the discovery of spores
e. disproved spontaneous generation - correct answer ✔✔ c. allowed the isolation of pure
cultures of bacteria
All of the following are true about penicillin EXCEPT that it
a. was discovered by Alexander Fleming.
b. was an accidental discovery.
c. is produced by a bacterium.
d. was the first antibiotic used by humans.
e. was purified less than 100 years ago - correct answer ✔✔ c. is produced by a bacterium.
(actually came from Penicillium fungi)
Which of the following statements regarding viruses is FALSE?
a. Most are too small to be seen by a light microscope.
b. They are "filterable agents" that can pass through porcelain filters that have a pore size that
blocks microbes.
c. Their genomes could be composed of DNA or RNA.
Questions from Midterm 1 and Quiz
Questions) fully solved
Analysis of DNA sequences reveals
a. the independent evolution of prokaryotes and eukaryotes from different origins.
b. that prokaryotes and eukaryotes evolved from a common ancestor.
c. that bacteria share a common ancestor with archaea but not with eukaryote.
d. that prokaryotes are cells with a nucleus.
e. that the genome of Haemophiles influenzae has about 2 billion base pairs. - correct answer
✔✔ b. that prokaryotes and eukaryotes evolved from a common ancestor.
Which one of the following statements regarding microbial cells is FALSE?
a. Microbial cells acquire food, gain energy to build themselves, and respond to environmental
change.
b. Most single-celled organisms require a microscope to render them visible, but some bacterial
cells are large enough to be seen with naked eyes.
c. Microbes always function as individual entities.
d. Many microbes form complex multicellular assemblages.
e. Viruses are not considered microbial cells - correct answer ✔✔ c. Microbes always function
as individual entities.
Suppose Pasteur's swan-necked flasks containing boiled broth became cloudy twenty-four hours
after boiling. Which choice could best explain the turbidity or cloudiness in the broth without
supporting spontaneous generation?
a. Endospores in the broth survived boiling and grew after the broth cooled.
, b. Contaminating organisms in the broth killed by boiling became alive again after the broth
cooled.
c. Chemicals in the broth came together to form living organisms.
d. The broth allowed light to pass through it with less interference after boiling.
e. Solid material in the broth dissolved during boiling. - correct answer ✔✔ a. Endospores in the
broth survived boiling and grew after the broth cooled.
The use of agar as a more robust gelling agent in solid media
a. allowed the propagation of lithotrophs
b. led to the discovery of viruses
c. allowed the isolation of pure cultures of bacteria
d. led to the discovery of spores
e. disproved spontaneous generation - correct answer ✔✔ c. allowed the isolation of pure
cultures of bacteria
All of the following are true about penicillin EXCEPT that it
a. was discovered by Alexander Fleming.
b. was an accidental discovery.
c. is produced by a bacterium.
d. was the first antibiotic used by humans.
e. was purified less than 100 years ago - correct answer ✔✔ c. is produced by a bacterium.
(actually came from Penicillium fungi)
Which of the following statements regarding viruses is FALSE?
a. Most are too small to be seen by a light microscope.
b. They are "filterable agents" that can pass through porcelain filters that have a pore size that
blocks microbes.
c. Their genomes could be composed of DNA or RNA.
