BROCK BIOLOGY OF MICROORGANISMS
ACTUAL EXAM PAPER 2026 QUESTIONS WITH
ANSWERS GRADED A+
◉ Which of the following statements is correct? Answer:
Microorganisms are significant contributors to the total biomass on
Earth.
◉ Differential selection and reproduction of phenotypes occurs during a
process called. Answer: evolution
◉ In what/which domain(s) of life is/are microorganisms represented?
Answer: Archaea, Bacteria, and Eukarya
◉ Biological catalysts involved in the acceleration of the rate of
chemical reactions are called. Answer: enzymes
◉ Regarding early life on Earth. Answer: microbial life existed for
billions of years before plant and animal life.
◉ The person who described the "wee animalcules" was. Answer:
Antoni van Leeuwenhoek
,◉ Walther Hesse and _____________ pioneered the use of agar as a
solidifying agent. Answer: Robert Koch
◉ Which of the following is/are characteristic of all cellular organisms?
Answer: evolution
◉ Deduce why viruses are excluded from the ribosomal RNA- based
tree of life. Answer: they lack ribosomal RNA (rRNA)
◉ Louise Pasteur developed the vaccine(s) for. Answer: anthrax, fowl
cholera, and rabies
◉ The discovery of antibiotics and other important chemicals led to the
field of. Answer: industrial microbiology
◉ Microbial sterilization is used to. Answer: kill all microbes in or on
objects
◉ Transparent double-sided dishes used for growing microbes are most
commonly called. Answer: petri dishes
, ◉ Microbes playing a role in nitrogen fixation in plants live in
________, while those playing a role in the digestive tract of certain
herbivores live in ________. Answer: nodules / rumens
◉ Which of the following is NOT an accomplishment of Louis Pasteur?
Answer: developed enrichment culture techniques
◉ The theory of spontaneous generation was refuted by the work of.
Answer: Louis Pasteur
◉ A Pasteur flask has a(n). Answer: swan neck to prevent particulate
matter from getting into the main body of the flask.
◉ Predict how Pasteur's conclusions on spontaneous generation with
swan flasks would have changed if he worked with and maintained the
flasks in a sterile laminar flow hood. Answer: Pasteur's flasks never
would have putrefied (decayed/rotted), and the experiment would not
have refuted spontaneous generation.
◉ A pure culture. Answer: is a population of identical cells
◉ Martinus Beijerinck was the first to isolate. Answer: green algae,
certain nitrogen-fixing root nodule bacteria, and certain sulfate-reducing
bacteria.
ACTUAL EXAM PAPER 2026 QUESTIONS WITH
ANSWERS GRADED A+
◉ Which of the following statements is correct? Answer:
Microorganisms are significant contributors to the total biomass on
Earth.
◉ Differential selection and reproduction of phenotypes occurs during a
process called. Answer: evolution
◉ In what/which domain(s) of life is/are microorganisms represented?
Answer: Archaea, Bacteria, and Eukarya
◉ Biological catalysts involved in the acceleration of the rate of
chemical reactions are called. Answer: enzymes
◉ Regarding early life on Earth. Answer: microbial life existed for
billions of years before plant and animal life.
◉ The person who described the "wee animalcules" was. Answer:
Antoni van Leeuwenhoek
,◉ Walther Hesse and _____________ pioneered the use of agar as a
solidifying agent. Answer: Robert Koch
◉ Which of the following is/are characteristic of all cellular organisms?
Answer: evolution
◉ Deduce why viruses are excluded from the ribosomal RNA- based
tree of life. Answer: they lack ribosomal RNA (rRNA)
◉ Louise Pasteur developed the vaccine(s) for. Answer: anthrax, fowl
cholera, and rabies
◉ The discovery of antibiotics and other important chemicals led to the
field of. Answer: industrial microbiology
◉ Microbial sterilization is used to. Answer: kill all microbes in or on
objects
◉ Transparent double-sided dishes used for growing microbes are most
commonly called. Answer: petri dishes
, ◉ Microbes playing a role in nitrogen fixation in plants live in
________, while those playing a role in the digestive tract of certain
herbivores live in ________. Answer: nodules / rumens
◉ Which of the following is NOT an accomplishment of Louis Pasteur?
Answer: developed enrichment culture techniques
◉ The theory of spontaneous generation was refuted by the work of.
Answer: Louis Pasteur
◉ A Pasteur flask has a(n). Answer: swan neck to prevent particulate
matter from getting into the main body of the flask.
◉ Predict how Pasteur's conclusions on spontaneous generation with
swan flasks would have changed if he worked with and maintained the
flasks in a sterile laminar flow hood. Answer: Pasteur's flasks never
would have putrefied (decayed/rotted), and the experiment would not
have refuted spontaneous generation.
◉ A pure culture. Answer: is a population of identical cells
◉ Martinus Beijerinck was the first to isolate. Answer: green algae,
certain nitrogen-fixing root nodule bacteria, and certain sulfate-reducing
bacteria.
