Bio 246 Exam 1 Practice | Latest 2026/27 Update
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1. In terms of microscopes, we can increase contrast by
adding water only to the object being viewed
looking at light colored objects using no light
decreasing the field of view
adding a stain or dye to the object being viewed
2. What is the best definition of cellular respiration?
Breathing on a cellular level.
A four-step metabolic process that uses ATP to make more ATP.
O2 and sugar being converted to energy and CO2 and water
released as waste.
Converting chemical energy into metabolic energy via enzymatic processes.
3. What are the two main roles of carbohydrates in cells?
Energy sources and structural components
Cell signaling and waste removal
Hormonal regulation and nutrient transport
Genetic information and energy storage
4. How would the germ theory of disease influence the development of
vaccines?
It would lead to the creation of vaccines targeting specific
microorganisms responsible for diseases.
It would focus on treating diseases rather than preventing them.
, It would discourage the use of vaccines in disease prevention.
It would suggest that vaccines are unnecessary for infectious diseases.
5. If a drug targets the proteins embedded in the cell membrane, what effect
might this have on the cell's interaction with its environment?
It could disrupt communication and transport processes.
It would strengthen the cell membrane's structure.
It would enhance the cell's ability to absorb nutrients.
It would have no effect on the cell's functions.
6. What does biodiversity refer to? Select the best answer.
The introduction of new types of plants and animals.
The different environmental regions in the world.
The spectrum of plant and animal types that exist in an ecosystem.
The creation of new types of ecosystems.
7. All of the following are true about cell theory except:
all living things are composed of cells.
the cell is the fundamental unit of all living things.
the organism is the fundamental unit of all living things.
all cells are derived from other cells.
8. Which theory states that all living things are composed of cells?
cell theory
Mendel's law
, evolutionary theory
Hooke's rule
9. Describe how a fecal transplant can affect the balance of bacteria in the gut.
A fecal transplant introduces healthy bacteria from a donor,
which helps to restore the balance of the gut microbiome.
A fecal transplant removes all bacteria from the gut to prevent
infections.
A fecal transplant has no effect on the gut microbiome.
A fecal transplant only adds more harmful bacteria to the gut.
10. Identify all the statements that describe the benefits of microbes from a human
perspective.
Nitrogen gas is not accessible for use by most organisms without the
help of some microbes
Today's environmental oxygen levels may be a direct result of
photosynthetic microbes
Microbes degrade/recycle metabolic wastes from other living organisms
All of the above
11. Most human pathogens grow optimally at 37 degrees Celsius. These
organisms would be described as:
hyperthermophiles
thermophiles
mesophiles
psychrophiles
, 12. In a laboratory setting, if a researcher fails to use aseptic technique while
handling cultures, what potential consequences could arise?
Contamination of cultures and inaccurate experimental results
Improved safety for laboratory personnel
Increased growth of desired microbes
Successful identification of microbial species
13. What do differential media contain that allows for the identification of
different microbial species?
Nutrient agar
Antibiotics
Culture media
Biochemical indicators
14. The Germ Theory of Disease states that _____ _.
microorganisms can only survive within humans
living microorganisms originate from non-living materials
all microorganisms cause disease
microorganisms cause certain diseases
15. Isolation of a bacterium from an environmental or mixed-culture sample is an
important technique because:
Isolation is a cool technique that is challenging for microbiology students.
Mixed cultures of bacteria are too consuming to catalog all of the
identifying characteristics.
None of the above
(PDF) | Graded A | Instant Pdf Download
1. In terms of microscopes, we can increase contrast by
adding water only to the object being viewed
looking at light colored objects using no light
decreasing the field of view
adding a stain or dye to the object being viewed
2. What is the best definition of cellular respiration?
Breathing on a cellular level.
A four-step metabolic process that uses ATP to make more ATP.
O2 and sugar being converted to energy and CO2 and water
released as waste.
Converting chemical energy into metabolic energy via enzymatic processes.
3. What are the two main roles of carbohydrates in cells?
Energy sources and structural components
Cell signaling and waste removal
Hormonal regulation and nutrient transport
Genetic information and energy storage
4. How would the germ theory of disease influence the development of
vaccines?
It would lead to the creation of vaccines targeting specific
microorganisms responsible for diseases.
It would focus on treating diseases rather than preventing them.
, It would discourage the use of vaccines in disease prevention.
It would suggest that vaccines are unnecessary for infectious diseases.
5. If a drug targets the proteins embedded in the cell membrane, what effect
might this have on the cell's interaction with its environment?
It could disrupt communication and transport processes.
It would strengthen the cell membrane's structure.
It would enhance the cell's ability to absorb nutrients.
It would have no effect on the cell's functions.
6. What does biodiversity refer to? Select the best answer.
The introduction of new types of plants and animals.
The different environmental regions in the world.
The spectrum of plant and animal types that exist in an ecosystem.
The creation of new types of ecosystems.
7. All of the following are true about cell theory except:
all living things are composed of cells.
the cell is the fundamental unit of all living things.
the organism is the fundamental unit of all living things.
all cells are derived from other cells.
8. Which theory states that all living things are composed of cells?
cell theory
Mendel's law
, evolutionary theory
Hooke's rule
9. Describe how a fecal transplant can affect the balance of bacteria in the gut.
A fecal transplant introduces healthy bacteria from a donor,
which helps to restore the balance of the gut microbiome.
A fecal transplant removes all bacteria from the gut to prevent
infections.
A fecal transplant has no effect on the gut microbiome.
A fecal transplant only adds more harmful bacteria to the gut.
10. Identify all the statements that describe the benefits of microbes from a human
perspective.
Nitrogen gas is not accessible for use by most organisms without the
help of some microbes
Today's environmental oxygen levels may be a direct result of
photosynthetic microbes
Microbes degrade/recycle metabolic wastes from other living organisms
All of the above
11. Most human pathogens grow optimally at 37 degrees Celsius. These
organisms would be described as:
hyperthermophiles
thermophiles
mesophiles
psychrophiles
, 12. In a laboratory setting, if a researcher fails to use aseptic technique while
handling cultures, what potential consequences could arise?
Contamination of cultures and inaccurate experimental results
Improved safety for laboratory personnel
Increased growth of desired microbes
Successful identification of microbial species
13. What do differential media contain that allows for the identification of
different microbial species?
Nutrient agar
Antibiotics
Culture media
Biochemical indicators
14. The Germ Theory of Disease states that _____ _.
microorganisms can only survive within humans
living microorganisms originate from non-living materials
all microorganisms cause disease
microorganisms cause certain diseases
15. Isolation of a bacterium from an environmental or mixed-culture sample is an
important technique because:
Isolation is a cool technique that is challenging for microbiology students.
Mixed cultures of bacteria are too consuming to catalog all of the
identifying characteristics.
None of the above
