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WorksheetsTools of Biology & Laboratory Skills Regents Review
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
When preparing a wet mount slide of onion cells, a student put a drop of Lugol's iodine on the slide. This iodine was added to:
a)
prevent air bubbles
b)
make cell structures more visible
c)
increase the magnification
d)
increase the rate of photosynthesis in cells
2.
A student views cheek cells under low power. Before switching to high power, the student should:
a)
adjust the ocular lens
b)
center the image being viewed
c)
adjust the course adjustment to move the stage away from the slide
d)
remove the slide from the stage
3.
Paper chromatography is a laboratory technique that is used to
a)
separate different molecules from one another
b)
stain cell organelles
c)
indicate the pH of a substance
d)
compare relative cell sizes
4.
A clear plastic ruler is placed across the middle of the field of view of a compound light microscope. A row of cells can be seen under low-power magnification (100×).
What is the average length of a single cell in micrometers (μm)?
What is the average length of a single cell in micrometers (μm)?
a)
10 μm
b)
100 μm
c)
200 μm
d)
2000 μm
5.
A student observes a red onion cell with a compound light microscope using low, then high power. The two views are represented in the picture.
The best explanation for the changes observed by the student is that, when switching from low to high power, the
The best explanation for the changes observed by the student is that, when switching from low to high power, the
a)
diameter of the field of view decreases
b)
slide was accidentally moved
c)
diameter of the field of view increases
d)
image is inverted and reversed
6.
A student observes a red onion cell with a compound light microscope using low, then high power. The two views are represented in the picture.
Which diagram represents where the cell should be located in the low-power field of view to be sure the entire cell will be visible after switching to high power?
Which diagram represents where the cell should be located in the low-power field of view to be sure the entire cell will be visible after switching to high power?
a)
1
b)
2
c)
3
d)
4
7.
Bromthymol blue turns yellow in the presence of carbon dioxide. This characteristic makes it possible for bromthymol blue to function as:
a)
a measure of volume
b)
an energy source
c)
a catalyst
d)
an indicator
8.
What is the volume of water represented in the graduated cylinder shown?
a)
10.3 mL
b)
13.0 mL
c)
14.0 mL
d)
15.0 mL
9.
After switching from the high power to the low power objective lens of a compound microscope, the area of the low power field will appear:
a)
Larger and brighter
b)
Smaller and brighter
c)
Larger and darker
d)
Smaller and darker
10.
The diagram represents a technique used in some molecular biology laboratories
This technique is a type of
This technique is a type of
a)
chromatography
b)
gel electrophoresis
c)
direct harvesting
d)
genetic engineering
11.
Which chemicals are used to cut DNA into fragments for a gel electrophoresis procedure?
a)
enzymes
b)
molecular bases
c)
hormones
d)
ATP molecules
12.
The parents of a new baby believe they brought the wrong child home from the hospital. Gel electrophoresis was performed using DNA samples from the parents and the child. A section of the gel electrophoresis results are shown in the diagram.
Which conclusion is valid based on the gel electrophoresis results?
Which conclusion is valid based on the gel electrophoresis results?
a)
They have the correct child, because her genetic information is identical to that of the father.
b)
They have the wrong child, because her genetic information does not match that of either parent.
c)
They have the correct child, because her genetic information came from both parents.
d)
They have the wrong child, because her genetic information matches only that of the mother.
13.
Samples of DNA from an eye-color gene of four individuals, W, X, Y, and Z, were cut into pieces using a type of chemical. The results of this procedure are shown in the diagram.
The diagram represents the results of the procedure known as
The diagram represents the results of the procedure known as
a)
cloning
b)
chromatography
c)
gel electrophoresis
d)
protein sequencing
14.
The results of an experiment using plant pigments is represented in the diagram.
Which phrase could be used to describe this technique?
Which phrase could be used to describe this technique?
a)
the use of chromatography to separate molecules in a mixture
b)
the use of cut leaves to observe certain colors
c)
using indicators to determine pH
d)
using dichotomous keys to identify plants
15.
A slide of human blood cells was observed in focus under the low-power objective of a compound light microscope that had clean lenses. When the microscope was switched to high power, the image was dark and fuzzy. Which parts of the microscope should be used to correct this situation?
a)
nosepiece and coarse adjustment
b)
diaphragm and ocular lens
c)
objective and fine adjustment
d)
diaphragm and fine adjustment
16.
A dichotomous key is shown.
Use the dichotomous key to identify the scientific name of the organism represented.
Use the dichotomous key to identify the scientific name of the organism represented.
a)
Alopias vulpinus
b)
.Lepidosiren paradoxa
c)
Monodon monoceros
d)
Sphyrna mokarran
17.
Gel electrophoresis is used to separate DNA fragments on the basis of their:
a)
size
b)
color
c)
functions
d)
chromosomes
18.
How much water should be removed from the graduated cylinder shown to leave 5 milliliters of water in the cylinder?
a)
6 mL
b)
12 mL
c)
7 mL
d)
11 mL
19.
How much water should be added to the graduated cylinder shown below to increase the volume to 15 milliliters?
a)
11 mL
b)
10 mL
c)
3 mL
d)
4 mL
20.
In an experiment, students placed a dialysis bag containing 100 mL of a starch-water mixture in a beaker of water, as shown below. They left the setup until class the next day, when they removed the dialysis bag and measured the volume of the contents. They found that there were now 125 mL of the starch-water mixture.
To measure the volume of the starch-water mixture in the dialysis bag, the students should have used a
To measure the volume of the starch-water mixture in the dialysis bag, the students should have used a
a)
meterstick
b)
triple-beam balance
c)
graduated cylinder
d)
test tube
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