MCB4403 Homework For Exam 1
Latest Update
All microbes contain a genome - ANSWER Which of the following statements is true
about all microbes?
Bacteria, Archaea, and Eukarya - ANSWER Identify the three domains of life according
to the classification system developed by Carl Woese.
Prokaryotes: bacteria and archaea
Eukaryotes: protists, algae, fungi, plants, and animals - ANSWER Classify each of the
following groups of organisms as prokaryotes or eukaryotes by dragging the items into
the correct category.
Light source - ANSWER Which of the following components was absent from
Leeuwenhoek's microscopes?
Dust in the air is a source of living microbes - ANSWER Louis Pasteur used a
swan-necked flask to demonstrate that
A culture that contains a single type or strain of microorganism - ANSWER A pure
culture refers to
Lack of cell structure - ANSWER Which of the following is a unique characteristic of
viruses that distinguishes them from the other major groups of microorganisms?
1. The microbe is found in all cases of the disease but is absent from healthy individuals.
2. The microbe is isolated from the diseased host and grown in pure culture.
3. When the microbe is introduced into a healthy, susceptible host, the same disease
occurs.
4. The same strain of microbe is obtained from the newly diseased host. - ANSWER Drag
the correct criteria to the illustration to complete Koch's postulates.
Pelomyxa (ameba), Spirogyra (algae), E. coli (bacteria), Prochloroccocus
(photosynthetic bacteria), Varicella-zoster (virus) - ANSWER Rank the following
microorganisms from largest to smallest in size.
Large population, rapid growth rate, transformation - ANSWER Compared to eukaryotic
microorganisms, bacteria are able to evolve very quickly, which allows these
microorganisms to adapt to new environments, use a variety or resources, and develop
antibiotic resistance. Which of the following sets of characteristics allow bacteria to
evolve so rapidly?
, Polymerase chain reaction (PCR) - ANSWER The process by which DNA is amplified in
vitro in the laboratory is called
Bioremediation - ANSWER The use of microbial metabolism to remove or neutralize
human waste and industrial pollutants is known as
The atmosphere - ANSWER Bacteria and archaea fix nitrogen (N2) by reducing it to
ammonia (NH3), the form of nitrogen assimilated by plants. The main reservoir of
nitrogen is
Nightingale-statistically quantified the impact of infectious disease on human
populations
Hooke-the first to record observations of microbes through simple microscopes
Spallanzani-showed that microbes arise from preexisting microbes and that heat
sterilization can prevent microbial growth
Pasteur-discovered the microbial basis of fermentation and showed that providing
oxygen does not
Tyndall-showed that repeated cycles of heat were necessary to eliminate spores formed
by certain kinds of bacteria - ANSWER Match each of the following scientists with his or
her major contribution to microbiology.
Nightingale - Hooke - Spallanzani - Pasteur - Tyndall
-showed that repeated cycles of heat were necessary to eliminate spores formed by
certain kinds of bacteria
-showed that microbes arise from preexisting microbes and that heat sterilization can
prevent microbial growth
- discovered the microbial basis of fermentation and showed that providing oxygen does
not enable spontaneous generation
-statistically quantified the impact of infectious disease on human populations
-the first to record observations of microbes through simple microscopes
Flemming -discovered that Penicillium mold generates a substance that kills bacterium
Ivanovsky-discovered viruses as filterable infective particles
Koch-devised techniques of pure culture to study a single species of microbe in
isolation
Jenner-established the practice of vaccination (inoculation with cowpox to prevent
smallpox)
Semmelweis-showed that antiseptics could prevent transmission of pathogens from
Latest Update
All microbes contain a genome - ANSWER Which of the following statements is true
about all microbes?
Bacteria, Archaea, and Eukarya - ANSWER Identify the three domains of life according
to the classification system developed by Carl Woese.
Prokaryotes: bacteria and archaea
Eukaryotes: protists, algae, fungi, plants, and animals - ANSWER Classify each of the
following groups of organisms as prokaryotes or eukaryotes by dragging the items into
the correct category.
Light source - ANSWER Which of the following components was absent from
Leeuwenhoek's microscopes?
Dust in the air is a source of living microbes - ANSWER Louis Pasteur used a
swan-necked flask to demonstrate that
A culture that contains a single type or strain of microorganism - ANSWER A pure
culture refers to
Lack of cell structure - ANSWER Which of the following is a unique characteristic of
viruses that distinguishes them from the other major groups of microorganisms?
1. The microbe is found in all cases of the disease but is absent from healthy individuals.
2. The microbe is isolated from the diseased host and grown in pure culture.
3. When the microbe is introduced into a healthy, susceptible host, the same disease
occurs.
4. The same strain of microbe is obtained from the newly diseased host. - ANSWER Drag
the correct criteria to the illustration to complete Koch's postulates.
Pelomyxa (ameba), Spirogyra (algae), E. coli (bacteria), Prochloroccocus
(photosynthetic bacteria), Varicella-zoster (virus) - ANSWER Rank the following
microorganisms from largest to smallest in size.
Large population, rapid growth rate, transformation - ANSWER Compared to eukaryotic
microorganisms, bacteria are able to evolve very quickly, which allows these
microorganisms to adapt to new environments, use a variety or resources, and develop
antibiotic resistance. Which of the following sets of characteristics allow bacteria to
evolve so rapidly?
, Polymerase chain reaction (PCR) - ANSWER The process by which DNA is amplified in
vitro in the laboratory is called
Bioremediation - ANSWER The use of microbial metabolism to remove or neutralize
human waste and industrial pollutants is known as
The atmosphere - ANSWER Bacteria and archaea fix nitrogen (N2) by reducing it to
ammonia (NH3), the form of nitrogen assimilated by plants. The main reservoir of
nitrogen is
Nightingale-statistically quantified the impact of infectious disease on human
populations
Hooke-the first to record observations of microbes through simple microscopes
Spallanzani-showed that microbes arise from preexisting microbes and that heat
sterilization can prevent microbial growth
Pasteur-discovered the microbial basis of fermentation and showed that providing
oxygen does not
Tyndall-showed that repeated cycles of heat were necessary to eliminate spores formed
by certain kinds of bacteria - ANSWER Match each of the following scientists with his or
her major contribution to microbiology.
Nightingale - Hooke - Spallanzani - Pasteur - Tyndall
-showed that repeated cycles of heat were necessary to eliminate spores formed by
certain kinds of bacteria
-showed that microbes arise from preexisting microbes and that heat sterilization can
prevent microbial growth
- discovered the microbial basis of fermentation and showed that providing oxygen does
not enable spontaneous generation
-statistically quantified the impact of infectious disease on human populations
-the first to record observations of microbes through simple microscopes
Flemming -discovered that Penicillium mold generates a substance that kills bacterium
Ivanovsky-discovered viruses as filterable infective particles
Koch-devised techniques of pure culture to study a single species of microbe in
isolation
Jenner-established the practice of vaccination (inoculation with cowpox to prevent
smallpox)
Semmelweis-showed that antiseptics could prevent transmission of pathogens from
