MBIO 3400 Lab Exam questions n
answers A+ rated
What are some ways that microorganisms are important to the environment? -
correct answer ✔✔They are important in nutrient cycling. This can include
nitrogen fixation and bioremediation.
What does ubiquitous mean and why do you think bacteria are ubiquitous? -
correct answer ✔✔Ubiquitous mean present everywhere. They are ubiquitous
because they have adapted to live in different environments.
How does the type of media influence the species isolated? - correct answer
✔✔The medium determines what microbes are most likely to grow within that
medium. For example, PDA favors fungal growth.
What do these abbreviations stand (PDA, BHI, and TSA) for? - correct answer ✔✔
Which plates are incubated upside down vs. right-side up? What is the rationale
for this? - correct answer ✔✔The plates are incubated right side up because the
fungi on the plates produce spores and keeping the plates right side up prevents
their spread. The plates are kept upside down to conserve the moisture on the
plate.
Why did we change the incubation temperature for different activities? - correct
answer ✔✔Different microbes grow in different temperature. For example
microbes that grow in human body, will be able to grow at the temperature
similar to that of human body.
, Why do we use microscopes? - correct answer ✔✔To see things that we cannot
see with the naked eye.
What are the two types of microscopes you used and how do they
compare/contrast? - correct answer ✔✔Dissecting microscope: Allows to view
object in 3D and has only one objective lens/magnification setting.
Compound microscope: Allows you to view specimens in 2D and it has several
objective lens/magnification settings.
Mention the top three important parts of the microscope. - correct answer ✔✔
How do you calculate the total magnification? - correct answer ✔✔ocular lens x
objective lens
How can you improve the quality of an image? - correct answer ✔✔Adjust the
fine focus knob which increases resolution.
Define the following terms, field of view, resolution, magnification, contrast, and
parfocal. - correct answer ✔✔-Field of view: Open observable area a person can
see through the microscope.
-Resolution: Shortest distance between two points on a specimen.
-Magnification: Measure of the ability of a lens or other optical instruments to
magnify.
-Contrast: Difference in light intensity between the image and the adjacent
background.
answers A+ rated
What are some ways that microorganisms are important to the environment? -
correct answer ✔✔They are important in nutrient cycling. This can include
nitrogen fixation and bioremediation.
What does ubiquitous mean and why do you think bacteria are ubiquitous? -
correct answer ✔✔Ubiquitous mean present everywhere. They are ubiquitous
because they have adapted to live in different environments.
How does the type of media influence the species isolated? - correct answer
✔✔The medium determines what microbes are most likely to grow within that
medium. For example, PDA favors fungal growth.
What do these abbreviations stand (PDA, BHI, and TSA) for? - correct answer ✔✔
Which plates are incubated upside down vs. right-side up? What is the rationale
for this? - correct answer ✔✔The plates are incubated right side up because the
fungi on the plates produce spores and keeping the plates right side up prevents
their spread. The plates are kept upside down to conserve the moisture on the
plate.
Why did we change the incubation temperature for different activities? - correct
answer ✔✔Different microbes grow in different temperature. For example
microbes that grow in human body, will be able to grow at the temperature
similar to that of human body.
, Why do we use microscopes? - correct answer ✔✔To see things that we cannot
see with the naked eye.
What are the two types of microscopes you used and how do they
compare/contrast? - correct answer ✔✔Dissecting microscope: Allows to view
object in 3D and has only one objective lens/magnification setting.
Compound microscope: Allows you to view specimens in 2D and it has several
objective lens/magnification settings.
Mention the top three important parts of the microscope. - correct answer ✔✔
How do you calculate the total magnification? - correct answer ✔✔ocular lens x
objective lens
How can you improve the quality of an image? - correct answer ✔✔Adjust the
fine focus knob which increases resolution.
Define the following terms, field of view, resolution, magnification, contrast, and
parfocal. - correct answer ✔✔-Field of view: Open observable area a person can
see through the microscope.
-Resolution: Shortest distance between two points on a specimen.
-Magnification: Measure of the ability of a lens or other optical instruments to
magnify.
-Contrast: Difference in light intensity between the image and the adjacent
background.
