biology lab test #1 Questions and Correct
Answers, 2024
scan
Which objective lens provides the least total magnification?
a coverslip
When preparing a wet mount specimen for viewing, the specimen should be covered
with...
rotating nosepiece
The objective lenses of the compound light microscope are attached to the
False
The total magnification achieved using a 10X objective lens with a 10X eyepiece is 20X.
microscope
compound light microscope
oil immersion
Which objective lens provides the highest total magnification
oil immersion steps
1. Focus on the specimen using the 40x objective lens.
2. Turn the objectives to half way between the 40x and the 100x lens.
3. Apply a drop of immersion oil directly onto area of the slide you were viewing.
4. Rotate the 100x lens over the microscope slide, and use the fine focus adjustment
know to sharpen the image.
magnification
A change in what component of microscopy influences the apparent size of the objects
being viewed?
40x
What lens could get dirty with oil if you move the revolving nosepiece in the wrong
direction after viewing under oil immersion?
add a drop of immersion oil before rotating the 100x lens into position.
you have successfully focused on an object with the 10x and 40x objective lenses. you
have rotated the 100x objective lens into position but are unable to obtain a sharp
image by rotating the fine focus adjustment know. Which of the following is most likely
to correct this problem?
increase the light intensity
after focusing on an object with the low power objective lens, you are trying to bring it
into focus under the 40x objective lens, but the field of view is very dark. which of the
following may remedy this problem?
10x
the magnification of the ocular lens is
locates the focus plane
the coarse adjustment knob on the microscope
fine-tunes the focus
the fine adjustment knob on the microscope
back and forth
the mechanical stage upper knob causes the stage to move
right and left
, the mechanical stage lower knob causes the stage to move
moveable
what does the term motile mean?
1. iris diaphram
2. adjustment knob
3. stage
4. condenser
5. objective lens system
1. increases or decreases the light intensity
2. causes stage (or objective lens) to move upward or downward
3. platform that supports a microscope slide
4. concentrates light onto the specimen
5. after light passes through the specimen, it next enters this lens system
1. eyepiece (ocular)
2. stage (slide) clip
3. field of view
4. arm
5. nosepiece
1. contains a lens at the top of the body tube
2. holds a microscope slide in position
3. circular area seen through the eyepiece
4. serves as a handle for carrying the microscope
5. part to which the objective lenses are attached
transfer pipette
clean slide
tweezers
cover slip
which of the following items will you need to make a wet mount?
false
a wet mount requires the addition of certain dyes and cell fixatives approximately 12
hours before viewing the specimen
oil immersion increases the resolving power of the specimen
using oil immersion is useful because
bacteria
algae
rotifers
human cells
protozoa
pond water can contain many types of organisms. which of the following are you most
likely to find in a pond water sample? please select all that apply.
albumin solution
the biuret test would indicate a positive result for proteins in which of the following
solutions?
catalytic activity
storage of genetic information
storage of energy
Answers, 2024
scan
Which objective lens provides the least total magnification?
a coverslip
When preparing a wet mount specimen for viewing, the specimen should be covered
with...
rotating nosepiece
The objective lenses of the compound light microscope are attached to the
False
The total magnification achieved using a 10X objective lens with a 10X eyepiece is 20X.
microscope
compound light microscope
oil immersion
Which objective lens provides the highest total magnification
oil immersion steps
1. Focus on the specimen using the 40x objective lens.
2. Turn the objectives to half way between the 40x and the 100x lens.
3. Apply a drop of immersion oil directly onto area of the slide you were viewing.
4. Rotate the 100x lens over the microscope slide, and use the fine focus adjustment
know to sharpen the image.
magnification
A change in what component of microscopy influences the apparent size of the objects
being viewed?
40x
What lens could get dirty with oil if you move the revolving nosepiece in the wrong
direction after viewing under oil immersion?
add a drop of immersion oil before rotating the 100x lens into position.
you have successfully focused on an object with the 10x and 40x objective lenses. you
have rotated the 100x objective lens into position but are unable to obtain a sharp
image by rotating the fine focus adjustment know. Which of the following is most likely
to correct this problem?
increase the light intensity
after focusing on an object with the low power objective lens, you are trying to bring it
into focus under the 40x objective lens, but the field of view is very dark. which of the
following may remedy this problem?
10x
the magnification of the ocular lens is
locates the focus plane
the coarse adjustment knob on the microscope
fine-tunes the focus
the fine adjustment knob on the microscope
back and forth
the mechanical stage upper knob causes the stage to move
right and left
, the mechanical stage lower knob causes the stage to move
moveable
what does the term motile mean?
1. iris diaphram
2. adjustment knob
3. stage
4. condenser
5. objective lens system
1. increases or decreases the light intensity
2. causes stage (or objective lens) to move upward or downward
3. platform that supports a microscope slide
4. concentrates light onto the specimen
5. after light passes through the specimen, it next enters this lens system
1. eyepiece (ocular)
2. stage (slide) clip
3. field of view
4. arm
5. nosepiece
1. contains a lens at the top of the body tube
2. holds a microscope slide in position
3. circular area seen through the eyepiece
4. serves as a handle for carrying the microscope
5. part to which the objective lenses are attached
transfer pipette
clean slide
tweezers
cover slip
which of the following items will you need to make a wet mount?
false
a wet mount requires the addition of certain dyes and cell fixatives approximately 12
hours before viewing the specimen
oil immersion increases the resolving power of the specimen
using oil immersion is useful because
bacteria
algae
rotifers
human cells
protozoa
pond water can contain many types of organisms. which of the following are you most
likely to find in a pond water sample? please select all that apply.
albumin solution
the biuret test would indicate a positive result for proteins in which of the following
solutions?
catalytic activity
storage of genetic information
storage of energy
