MCB 100 Exam 1 Study Questions and Correct Answers
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Course
MCB 100
Institution
MCB 100
Should an understanding of science and how scientific inquiry or thinking works be part of our definitions of what constitutes an educated person and a good citizen? Yes, it is important for everyone
What is the purpose of the scientific method? to minimize bias and error in experiments
What are ...
MCB 100 Exam 1 Study Questions and
Correct Answers
Should an understanding of science and how scientific inquiry or thinking works be part
of our definitions of what constitutes an educated person and a good citizen? ✅Yes, it
is important for everyone
What is the purpose of the scientific method? ✅to minimize bias and error in
experiments
What are these? ✅image a: microbes in sea water seen by microscope image
Image b: stars in a Huddle telescope
What invention was critical to the field of microbiology? ✅the microscope
How much smaller is a bacterium (~1 um) than a human (~1-2 m)? ✅~one million
times smaller
What is the best tool for visualizing viruses? ✅electron microscope
Many biological samples are transparent, so how do we visualize them using
microscopes? ✅treat them with chemicals
Which of the following statements is not correct in regards to the differences between
prokaryotic and eukaryotic cells? ✅prokaryotes have membrane enclosed organelles
What is one way prokaryotes do not react to their environment? ✅build a fort
Dr. Ralph wolfe isolated the first methanogen in pure culture. How did this contribute to
dr. Carl woese's recognition of the tree of life into three domains? ✅it was comparisons
between the 16s rrna of methanogens, which are archaea and bacteria that resulted in
recognizing the different between these two domains
What is the most abundant macromolecule component in a cell? ✅proteins
How do enzymes catalyze reactions? ✅by lowering activation energy needed to trigger
a reaction
What is the first step in protein catabolism? ✅proteases break down proteins into their
constituent amino acids
,What is the function of photosynthesis systems within photosynthetic cells like
cyanobacteria and algae? ✅to absorb light energy and store it as ATP and NADPH
What is the doubling time for an organism? ✅look at the graph and find two points that
line up nicely, subtract the time on the x axis
What type of microscope captured the image of staphylococcus aureus? ✅SEM
(scanning electron microscope)
What term describes the total number of different organisms found in a given location?
✅biodiversity
Where would you be most likely to find homogeneous microbial populations ✅hot
springs
The "greenhouse gas" methane is produced by? ✅archaea
Without human influence, there could not be an excess of CO2 in the atmosphere?
✅false
Why are synthetic compounds often difficult for microbes to biodegrade? ✅many
synthetic compounds can't be recognized by microbial enzymes
How do nitrogen fixing prokaryotes make ammonia (NH3) from di-nitrogen (N2) gas in
the atmosphere ✅
In which location would you expect the highest density of biodiversity and biomass?
✅topsoil
Which form of symbiosis is least commonly shared between humans and their
microbiome? ✅parasitism
Order the size of the human microbiome by location from least to most ✅eyes, urinary
tract, respiratory tract, mouth, intestines
What is produced when ethanol from the fermentation of fruits, grains, or vegetables is
oxidized to acetic acid? ✅vinegar
Sourdough bread is produced using ✅both yeast saccharomyces cerevisiae and lactic
acid bacteria
What is the major microbial product that aids in the pickling or fermentation of
vegetables? ✅lactic acid
, What is true of starter cultures? ✅they are used to control fermentation process
Given that fermentation involved microbes, why is the first step in cheese production
pasteurization of the milk? ✅to remove unwanted microbes introduced into the milk
during the milking process
The difference between swiss cheese and blue cheese is ✅different starter cultures
are used
What beverage is made from fermented fruit? ✅brandy
What is an application of proteases to degrade protein? ✅meat tenderizer
The richmond mine has about 95% pyrite ore deposit and dissolves 2,000 tons of pyrite
per year, why so much? ✅There is a major jewelry industry for the pyrite gemstone.
The pyrite can be used for building roads.
The pyrite is mixed with other more valuable metal ores.
Pyrite is needed to make steel and iron works.
Pyrite is used as a catalyst to extract other valuable metals from the ore.
Antiseptic medical techniques, hospital microbiology ✅lister, nightingale
Serology, immunology ✅jenner, von behring, kitasato
Chemotherapy ✅ehrlich
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