BROCK BIOLOGY OF MICROORGANISMS
ACTUAL EXAMINATION TEST 2026
COMPLETE QUESTIONS AND SOLUTIONS
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
ACTUAL EXAMINATION TEST 2026
COMPLETE QUESTIONS AND SOLUTIONS
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
