Rio Salado College BIO 156 Lab Practical 1 || Answers 100% Rated
Correct.
When a patient has some form of anemia, this may be diagnosed by counting the numbers of red
blood cells in the patient's blood sample paired with an examination of the size and shape of the
individual blood cells. Which type of microscope would be the best choice for this type of
assessment, and why? correct answers The compound light microscope this microscope would be
helpful because it is used to study individual cell sizes, shapes, arrangement, number, and general
appearance of the cell. This type of microscope would be good when look at the size and shape
of each individual cells for determining anemia
6 parts of a microscope correct answers Body tube
E.condenser
G.Illuminator/ light source
H. Base
I.Coarse focus knob
K.arm
Why can't light microscopes be reliably used to achieve magnification levels above 1000x?
correct answers Light microscopes can't produce sufficient resolving power to clearly distinguish
close objects as separate
If using a monocular compound light microscope, would it be necessary to make a diopter
adjustment? correct answers No it would not be necessary because there is only one ocular lens
How can you tell if the interpupillary distance has been adjusted correctly? correct answers The
interpupillary distance is adjusted correctly if it shows one image when you look into the oculars.
What is the total magnification when using a compound microscope with an objective lens of
10X and an ocular lens of 10X? Show the calculation used to derive the answer. correct answers
objective (10x) x Ocular (10x)= total magnification 100x
, Using which objective magnification were you best able to see the sequence of colors? Given a
10x ocular lens, what is total magnification when using this objective? correct answers I was able
to see red on top, yellow in the middle, and greenish blue on top color of threads
- 10x was the objective
How did increasing the objective magnification impact the field of view? correct answers
increasing the view cause the red to kind of disappear and only yellow and the green blue color
threads to be left.
While viewing the colored threads slide on the compound binocular light microscope, Ari
realized that he needed to increase the contrast on the specimen. What specific adjustment should
he make to improve the contrast? correct answers reduce the opening of the iris diaphragm
On which particular slide (name of the specimen) did you observe flagella? Describe what this
structure looks like. correct answers Euglena, It looks like a tail connected to the rest of the cell
On which particular slide (name of the specimen) did you observe Gram negative cells? Describe
what they look like. correct answers The negative gram cell was the Spirilla, they are spiral,
coma shape, kind of like little noddles
What is the primary structural difference between prokaryotic cells and eukaryotic cells? (1
point) correct answers Eukaryotic cells have a nucleus while prokaryotic cells don't and are more
spiral coma shaped.
Imagine you were given the opportunity to examine a eukaryotic cell using electron microscopy.
Which type of microscope would give you the best view of the internal structure described in
part a, a scanning electron microscope or a transmission electron microscope? Explain your
choice. (1 point) correct answers A transmission electron microscope would be the better
microscope because it shows internal details of the cell and magnifies up to 100,000X
Correct.
When a patient has some form of anemia, this may be diagnosed by counting the numbers of red
blood cells in the patient's blood sample paired with an examination of the size and shape of the
individual blood cells. Which type of microscope would be the best choice for this type of
assessment, and why? correct answers The compound light microscope this microscope would be
helpful because it is used to study individual cell sizes, shapes, arrangement, number, and general
appearance of the cell. This type of microscope would be good when look at the size and shape
of each individual cells for determining anemia
6 parts of a microscope correct answers Body tube
E.condenser
G.Illuminator/ light source
H. Base
I.Coarse focus knob
K.arm
Why can't light microscopes be reliably used to achieve magnification levels above 1000x?
correct answers Light microscopes can't produce sufficient resolving power to clearly distinguish
close objects as separate
If using a monocular compound light microscope, would it be necessary to make a diopter
adjustment? correct answers No it would not be necessary because there is only one ocular lens
How can you tell if the interpupillary distance has been adjusted correctly? correct answers The
interpupillary distance is adjusted correctly if it shows one image when you look into the oculars.
What is the total magnification when using a compound microscope with an objective lens of
10X and an ocular lens of 10X? Show the calculation used to derive the answer. correct answers
objective (10x) x Ocular (10x)= total magnification 100x
, Using which objective magnification were you best able to see the sequence of colors? Given a
10x ocular lens, what is total magnification when using this objective? correct answers I was able
to see red on top, yellow in the middle, and greenish blue on top color of threads
- 10x was the objective
How did increasing the objective magnification impact the field of view? correct answers
increasing the view cause the red to kind of disappear and only yellow and the green blue color
threads to be left.
While viewing the colored threads slide on the compound binocular light microscope, Ari
realized that he needed to increase the contrast on the specimen. What specific adjustment should
he make to improve the contrast? correct answers reduce the opening of the iris diaphragm
On which particular slide (name of the specimen) did you observe flagella? Describe what this
structure looks like. correct answers Euglena, It looks like a tail connected to the rest of the cell
On which particular slide (name of the specimen) did you observe Gram negative cells? Describe
what they look like. correct answers The negative gram cell was the Spirilla, they are spiral,
coma shape, kind of like little noddles
What is the primary structural difference between prokaryotic cells and eukaryotic cells? (1
point) correct answers Eukaryotic cells have a nucleus while prokaryotic cells don't and are more
spiral coma shaped.
Imagine you were given the opportunity to examine a eukaryotic cell using electron microscopy.
Which type of microscope would give you the best view of the internal structure described in
part a, a scanning electron microscope or a transmission electron microscope? Explain your
choice. (1 point) correct answers A transmission electron microscope would be the better
microscope because it shows internal details of the cell and magnifies up to 100,000X
