Download Biology - Fall Semester Final Exam 2013-2014

Biology - Fall Semester Final Exam 2013-2014
Some questions (c) 2014 by Region 10 Educational Service Center.
Some questions (c) 2014 by TEKS Resource System.
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1
The flow of energy and materials
2
Photosynthesis and cellular respiration
during the production of ATP is shown
differ in which of the following ways?
in the diagram below.
A
The energy conversion in cellular
respiration takes place in the
chloroplast.
B
The main source of energy in
cellular respiration is glucose.
C
The main source of chemical
energy in cellular respiration is
water.
D The final product of cellular
respiration is electromagnetic
radiation.
What kind of energy transformation
occurs during the process of
photosynthesis?
A
B
C
Light energy is converted into
3
An accepted principle or statement
chemical energy.
based on natural and physical
Chemical energy is converted
phenomena that is supported by data
into light energy.
from a collection of repeated tests by
Light energy is converted into
mechanical energy.
D Light energy is converted into
electrical energy.
independent researchers is a –
A
hypothesis
B
fact
C
theory
D law
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4
Energy conversion within a plant cell
7
Which of the following is arranged in
would be limited most severely by
the order of increasing levels of
removal of the cell's –
organization?
A
mitochondria
A
Molecule, atom, cell
B
chloroplasts
B
Cell, atom, molecule
C
ribosomes
C
Atom, molecule, cell
D endoplasmic reticulum
D Cell, molecule, atom
8
What type of reaction is needed to
organize simple organic molecules,
known as monomers, into long
5
Food provides the human body with
all the following except –
A
calories
B
nutrients
C
oxygen
D water
6
complex molecules known as
polymers?
A
Miller-Urey reaction
B
Dehydration synthesis reaction
C
Hydrolysis reaction
D Covalent reaction
The energy that comes from organic
compounds is transferred to the cell
to maintain healthy function. Which
organelle in an animal cell is
responsible for this energy transfer?
A
mitochondria
B
nucleus
C
ribosomes
D cytoplasm
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9
Which of the structures shown above packages proteins that are to be released from
the cell?
A
1
B
2
C
3
D 4
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Use the following diagram for the next two questions.
10
In the Enzyme-Substrate Complex, what is represented by Y?
A
Enzyme
B
Substrate
C
Active site
D Product
11
What does Step III in the diagram above illustrate?
A
Enzyme specificity
B
Changes in enzymes after reaction
C
Conversion of substrate into products
D Release of activation energy
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12
Which is the MOST valid conclusion
13
based on this graph?
A student measured the time
required for a protein sample to be
A
B
C
completely digested in the presence
Enzymes are not affected greatly
of an enzyme under different pH
by temperature.
levels. At which pH is the enzyme
Enzymes work most effectively
most active?
at low temperatures.
A
6.8
Raising the temperature always
B
6.9 makes an enzyme work better.
C
7.1
D Enzyme function decreases after
D 7.2
a certain favorable temperature.
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14
One function of the carbohydrate macromolecule is to store energy. Which other
macromolecule also functions in storing energy?
A
DNA
B
Protein
C
RNA
D Lipid
15
The subunits of a protein are —
A
polysaccharides
B
carbohydrates
C
amino acids
D lipids
16
A macromolecule is composed of glycerol and fatty acids and functions as a
hormone. This molecule is a —
A
phosphate
B
lipid
C
polysaccharide
D carbohydrate
17
Which statement best describes the function of nucleic acids?
A
Stores genetic information and helps to make proteins
B
Increases the rate of chemical reactions
C
Stimulates metabolism in all body cells
D Activates secretion of the body's hormones
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18
Large biological molecules are made up of smaller subunits. What are these smaller
subunits called?
A
Enzymes
B
Polymers
C
Monomers
D Cells
19
Which of the following is a function of a carbohydrate?
A
Forms the cell wall
B
Insulation
C
Gene expression
D Regulates enzymes
20
Which of the following biomolecules typically contains both nitrogen and phosphate?
A
Lipid
B
Protein
C
Nucleic acid
D Carbohydrate
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21
Which of these best represents a fatty-acid molecule?
A
B
C
D
22
What monomer is represented by
23
Macromolecules which are both
this diagram?
hydrophobic and hydrophilic and are
a major component of cell
membranes are –
A
monosaccharide
B
nucleotide
C
glycerol
A
polysaccharides
B
proteins
C
phospholipids
D inorganic
D amino acid
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24
Which of the following
26
macromolecules are a prominent
starch. When energy is needed, the
part of animal tissues that function in
starch molecules can be broken
insulation, helping animals conserve
down quickly. This chemical reaction
heat?
produces which of the following?
A
carbohydrates
A
amino acids
B
lipids
B
lipids
C
proteins
C
monosaccharides
D nucleic acids
25
Many land plants store energy in
Many plants have waxy coatings on
D RNA chains
27
Which biomolecule's function is least
some surfaces. This coating reduces
likely to be affected by the order of
water loss because it is not water-
its single-molecule units?
permeable. This waxy coating is
A
DNA
B
starch
C
RNA
which of the following types of
organic molecule?
A
carbohydrate
B
lipid
C
nucleic acid
D protein
D protein
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28
The enzymes that catalyze cellular reactions are macromolecules called proteins. Which of the following elements most often compose proteins?
A
carbon and hydrogen
B
carbon, hydrogen, oxygen, and nitrogen
C
carbon, hydrogen, and oxygen
D carbon, hydrogen, oxygen, nitrogen, and phosphorus
29
The compound synthesized during
photosynthesis is —
A
H2 O
B
C 6 H12O6
C
CO2
D O2
30
Which biomolecule do living
organisms use as energy storage?
A
carbohydrates
B
lipids
C
protein
D nucleic acid
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31
What theory is illustrated by this diagram?
A
Cell Theory
B
Miller-Urey Theory
C
Endosymbiotic Theory D Darwin's Theory of Evolution
32
Which of the following structures do
plant cells have that animal cells do
not?
A
Vacuoles and cell membranes
B
Chloroplasts and mitochondria
C
Chloroplasts and cell walls
D Cell walls and cell membranes
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33
Identify the organelle capable of reproducing independently within the cell.
A
W
B
X
C
Y
D Z
34
Which of the following would complete the analogy:
chloroplast : __________ :: __________ : __________ A
respiration :: mitochondria : photosynthesis
B
respiration :: cell membrane: photosynthesis
C
photosynthesis :: cell membrane: respiration
D photosynthesis :: mitochondria : respiration
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35
What compound is most likely found at W?
A
NADH
B
ATP
C
C 6 H12O6
D pyruvate
36
What is the purpose of ATP in both
cellular respiration and
photosynthesis?
A
To breakdown glucose to release
energy
B
To work as an enzyme
C
To absorb electrons from water
D To transfer energy from one
molecule to another
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37
Which of the following is a graphical depiction of an example of active transport
taking place?
A
B
C
D
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38
The diagram below illustrates a cellular process.
Which of the following best explains the process illustrated in the above diagram?
A
Passage of water molecules through a semi-permeable membrane to equalize
concentration
B
Transport of molecules across a membrane from a high to low concentration
gradient by means of a carrier molecule
C
Movement of molecules against a concentration gradient expending energy
D Separation of suspended particles from a fluid environment through a porous
membrane
39
The cellular process known as the sodium-potassium pump was discovered in the
1950s by Jens Christian Skou, a Danish scientist. This process is a form of active
transport that moves three sodium ions to the outside of a cell for every two
potassium ions that it moves into the cell. Which of these best explains why energy
is needed for active transport?
A
Ions are negatively charged.
B
Ions are attached to large proteins.
C
Ions are trapped inside the plasma membrane.
D Ions are moved against the concentration gradient.
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40
Which cellular process takes place in the ribosomes that are bound to the
endoplasmic reticulum?
A
The breakdown of waste material
B
The conversion of radiant energy to glucose
C
The synthesis of new proteins
D The replication of nucleic acids
41
Which of these statements best explains the process of energy conversion that
takes place in the mitochondria?
A
Energy is required for carbon dioxide molecules to form six-carbon sugar
molecules.
B
Water molecules and radiant energy are necessary for anaerobic respiration to
take place.
C
Oxygen molecules release energy in the form of heat during combustion
reactions.
D The energy in the bonds of glucose molecules is transferred to the phosphate
bonds in ATP.
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42
Identify the cell organelle and process.
A
ribosome, protein synthesis
B
chloroplast, photosynthesis
C
chromosome, DNA replication
D mitochondrion, respiration
43
What types of energy are represented at S and X?
A
S - heat energy, X - chemical energy
B
S - light energy, X - electrical energy
C
S - ADP, X - ATP
D S - light energy, X - heat energy
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44
What is the correct sequence of
stages in cellular respiration?
A
glycolysis, electron transport
chain, Krebs cycle
B
Krebs cycle, electron transport
chain, glycolysis
C
glycolysis, Krebs cycle, electron
transport chain
D electron transport chain, Krebs
cycle, glycolysis
45
What substance (X) initiates this
stage of cellular respiration?
A
glucose
B
pyruvic acid
C
water
D lactic acid
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46
Amoebas are one-celled organisms that live in water, mud, and in animals. These
creatures have a flexible cell membrane filled with watery cytoplasm. The actions of
the amoeba are directed by the nucleus. Contractile vacuoles store and discharge
water. To move, the liquid cytoplasm streams to the edge of the cell wall and forms
pseudopodia, or false feet. These pseudopodia surround the amoeba’s prey and
engulf the food into a food vacuole where it is digested by enzymes. Which structure of the amoeba plays the main role in maintaining homeostasis with
its watery environment?
A
nucleus
B
food vacuole
C
pseudopodium
D contractile vacuole
47
Diffusion and osmosis are both vital
to cell function. Diffusion and
osmosis are similar in that they are
both types of –
A
protein synthesis processes B
passive transport processes
C
cellular replication processes
D cellular metabolism processes
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48
Which cellular process would be affected first if the structure labeled 3 were
destroyed?
A
photosynthesis
B
reproduction
C
respiration
D transport
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49
A pond near the school was used in a study. Water was collected and tests were run
that included a pH test. The tests over a period of six weeks indicated that the pH
was increasing. Observations of the pond surface also showed that there was an
increasing population of green water plants surrounding, and almost covering, certain
portions of the pond.
- What cellular process is the green aquatic plant most likely carrying out that would
result in an increase in the pH of water?
A
respiration
B
photosynthesis
C
transpiration
D reproduction
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50
A student put some drops of Lugol’s iodine solution into the water in the beaker
shown above. The water turned red. After a short time, the starch solution inside the
dialysis tubing turned black. Which function of the cell membrane was the student
demonstrating?
A
facilitated diffusion of starch
B
active transport of hydrogen ions
C
diffusion through a permeable membrane
D diffusion through a semipermeable membrane
51
Which statement applies to
52
Which structure can be found in both
eukaryotic cells but not to
eukaryotic and prokaryotic cells?
prokaryotic cells?
A
Mitochondrion
A
B
Nucleus
C
Chloroplast
Utilize mitochondria during
energy production
B
Flow of nutrients and wastes
occurs across a membrane
C
D Nucleic acid
Contain DNA as genetic material
D Perform metabolic processes
with the help of chemicals
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53
Which of these is a defining
55
characteristic in a eukaryotic cell?
animal cells. Which cellular structure
A
presence of a membrane bound
in plant cells is most responsible for
nucleus
this characteristic?
B
DNA is present
A
vacuole
C
absence of membrane bound
B
cell wall
mitochondria
C
chloroplast
D reproduces asexually
54
Plant cells are much less flexible than
What is the function of the cell wall in
D cell membrane
56
Which structures, if found in a cell,
a plant cell?
would provide the best evidence that
A
contain waste products of the
the cell is eukaryotic?
cell
A
Chromosomes
generate the cell's supply of
B
Cell Walls
energy
C
Carbohydrates
control the functions of the cell
D Internal Membranes
B
C
D provide structural support and
protection
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57
58
Students grow bacteria in a Petri
dish containing agar that has been
divided into four sections. After the
bacterial colonies are established,
the students place a drop of rubbing
alcohol in each section. The students
hypothesize that the alcohol will
inhibit bacterial growth. At the end of
twenty-four hours, students observe
that there are fewer and smaller
colonies of bacteria in each section.
A student concludes that the
The cell structure labeled X is
found only in –
hypothesis was supported. How
could the experimental setup be
changed to strengthen the student's
A
animal cells
B
eukaryotic cells
C
plant cells
D prokaryotic cells
conclusion?
A
by increasing the temperature
B
by adding a control group
C
by measuring the size of the
drop of alcohol on each section
D by using different brands of
rubbing alcohol
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59
The timeline below summarizes work by various scientists from 1838 to 1855. Their contributions resulted in the –
A
Cell Theory
B
Endosymbiotic Theory
C
Germ Theory of Disease
D Ohno's Law
60
Which scientist is responsible for describing the process occurring at Y?
A
Carolus Linnaeus
B
Theodor Schwann
C
Hans Kreb
D Edward Jenner
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61
What is the main purpose of the Krebs Cycle in a cell?
A
To produce energy-carrier molecules such as NADH and FADH2
B
To convert FAD molecules into water to nourish the cell membrane
C
To rid the cell of citric acid to prevent buildup of waste product
D To deplete the cell of oxygen and carbon dioxide by producing NADH
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62
Which of the following is a correct graphical representation of the organizational
levels of a biological system, with the outside being the physically largest type?
A
B
C
D
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63
A student reads a label that states,
64
A student reads the following
"This sports drink will help you keep
advertisement for a cooking oil:
going through a tough workout,
"Now you can enjoy your favorite
restoring essential vitamins and
foods and feel good about it. Clinical
minerals to your body during
tests have shown that our light-
exercise." tasting cooking oil can help you
Based on this claim, the student is
maintain a healthy weight as part of
able to conclude that the sports
a sensible diet. You no longer need
drink contains –
to sacrifice the taste of the foods
A
carbohydrates
you love."
B
vitamins B, C, and D
C
some types of vitamins and
conclusion the student can make
minerals
about this cooking oil?
D the recommended daily amount
Based on this claim, which of the
following is the most likely
A
of vitamins and minerals
This is the best tasting cooking
oil on the market.
B
This cooking oil is the healthiest
oil a person can use to fry foods.
C
Use of this oil will cause
everyone who uses it to lose
weight without exercise.
D Use of this oil, combined with
wise food choices, will help a
person lose weight.
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Nested Venn Diagram
Identify the Venn diagram section(s) which include(s) prokaryotic cells.
A
I
B
II, III, IV
C
I, II, III, IV
D IV
66
What additional characteristic (X) belongs in the central section of the Venn diagram?
A
Ribosome
B
Mitochondrion
C
Chloroplast
D Endoplasmic reticulum
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67
Which of the following molecules is formed from a product of photosynthesis?
A
B
C
D
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68
Which is the MOST valid conclusion
based on this graph?
A
Enzyme action is constant
regardless of temperature.
B
Enzymes require low
temperatures in order to
function.
C
Enzymes function most
efficiently at high temperatures.
D Enzyme action decreases after a
certain favorable temperature.
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69
Oxygen Production
Distance from Oxygen Bubbles
Light (cm)
Per Minute
10
38
20
21
30
8
40
?
50
2
Students in a biology class placed a water plant in bright light and counted the
number of bubbles of oxygen it produced per minute. They repeated the test with
the same plant at various distances from the light. Their results are shown in the
chart above.
The students forgot to record the number of bubbles that the plant produced at
40cm. Which of the following is the most likely number of bubbles produced at
40cm?
A
17
B
7
C
4
D 1
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70
71
Students in a biology class are
preparing wet mounts of onion skin
cells to observe with a compound
light microscope. Which of the
following sets of supplies would be
most appropriate for this activity?
A
a prepared slide, methylene blue,
and a toothpick
B
a microscope slide, water, and a
cover slip
Based on the food web, which of the
C
following is most likely responsible
water
for the rabbit population trend as
D a cover slip, razor blade, and
shown in the graph?
A
decrease in fox population
B
decrease in amount of grass
C
increase in number of acorns
D increase in squirrel population
a depression slide, scissors, and
water
72
Read the statement below.
If proteins are synthesized on
ribosomes, then enzymes that
destroy RNA will inhibit protein
production in the cell.
If the above statement were used in
an experimental design, which term
would describe the role of the
phrase "enzymes that destroy RNA"
in the experiment?
A
hypothesis
B
dependent variable
C
conclusion
D independent variable
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73
An engineer has created a new
74
A student uses small, thin tubes
series of tire designs for a specific
made of semipermeable membranes
Formula One race car. It is
that are filled with iodine, glucose,
necessary to know which tire design
and starch solutions to see how fast
will allow the car to run at its peak
each solution will diffuse out of the
performance. Which experimental
tubes. Which of the following is a
design is best for this investigation?
hypothesis that could be tested
A
Use one tire design on the car
using this experimental design?
and measure its performance.
A
B
Use one tire design on many
affect the rate it will diffuse out
types of cars and measure their
of the tube?
performances.
C
Does the size of the molecule
B
The time it takes large and small
Use the various tire designs on
molecules to diffuse out of the
the car and measure
tube will be recorded and
performance against the
compared.
standard tires.
D Use only conventional tire
C
If the rate of diffusion through a
cellulose tube depends on the
designs to measure
size of the molecules, then
performance.
smaller molecules will diffuse out
of the tube faster.
D Cellulose tubes containing iodine,
glucose, and starch will be placed
in a beaker of water, and after
one hour, the water will be
tested for the presence of the
three materials.
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75
Which of these statements is a
77
What do glycolysis, fermentation,
theory?
and cellular respiration have in
A
The heart pumps deoxygenated
common?
blood to the lungs.
A
B
C
which cells obtain or use energy.
All living things are composed of
at least one cell, and the cell is
All are metabolic pathways by
B
All require oxygen to break
the fundamental unit of function
molecular bonds for ATP
in all organisms.
production.
Cell phones, due to the
electromagnetic radiation they
emit, may cause brain cancer.
D Eye color is genetically
C
All processes occur in all living
organisms.
D All produce relatively equal
amounts of ATP.
determined.
76
When is a hypothesis accepted as a
theory by the scientific community?
A
A well-stated hypothesis and
related theory are both
acceptable because they are
considered interchangeable.
B
A disproven hypothesis that has
been corrected and restated is
considered a theory.
C
A hypothesis becomes a theory
after repeated tests accumulate
sufficient evidence to support the
hypothesis.
D A testable hypothesis confirmed
by two scientists results in a
theory.
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78
Which of the following are true regarding scientific theories such as the Cell Theory?
I. Scientific theories are well established and reliable.
II. Scientific theories have been examined by multiple researchers.
III. Scientific theories are subject to change when new evidence is inconsistent with,
or cannot be explained by, current theory.
IV. Scientific theories have changed over time.
A
I & II
B
II only
C
II & III
D I, II, III & IV
79
The process of glycolysis is followed by fermentation when anaerobic conditions
exist. There are two main types of fermentation. The equations for each type are
shown below.
The “?” shown in the image above represents the product(s) for each type of
reaction. What products do the two question marks (“?”) represent in each type of
fermentation?
A
Type 1: lactic acid; Type 2: glucose
B
Type 1: CO2 + H2O; Type 2: alcohol
C
Type 1: lactic acid; Type 2: alcohol + CO2
D Type 1: lactase; Type 2: ethyl alcohol
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80
81
The concept map below shows the
flow of energy and materials in
photosynthesis and cellular
respiration.
Choose the terms that complete the
diagram at X and Y.
A
X-oxygen, Y-carbon dioxide
B
X-energy, Y-carbon dioxide
C
X-water, Y-energy
D X-energy, Y-energy
Which molecules are represented in
the figure by the number 2?
A
H2O and O2
B
H2O and CO2
C
sugars and O2
D sugars and CO2
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82
The table below shows the main reactions of photosynthesis. The following
information is missing from the table:
• Location and products of light-dependent reactions
• Reactants of light-independent reactions
Where would ATP be listed within this table?
A
1 and 2
B
2 only
C
3 only
D 2 and 3
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83
A teacher set up a demonstration with 5 fermentation flasks filled with the solutions
listed below. She added 10 ml of yeast solution to each flask, and students
observed the flasks every 10 minutes for the rest of the class period.
What was the purpose of the demonstration?
A
To observe the conversion of sugars into ethanol by yeast
B
To test for lactic acid production during fermentation
C
To compare the fermentation of substrates by yeast
D To investigate the fermentation of various concentrations of carbohydrates
84
Which of the following
85
Which of the following molecules are
macromolecules are a prominent
needed for photosynthesis?
part of animal connective tissue such
A
light and oxygen
B
carbon dioxide and oxygen
C
water and carbon dioxide
as cartilage and keratin?
A
carbohydrates B
lipids
C
proteins
D glucose and oxygen
D nucleic acids
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86
A person is asked to run on a treadmill for two hours so data can be gathered on
how lactic acid accumulates in the human body. The results are placed in the table
below.
Using the information in the table, determine how the respiration of the person has
changed throughout the run.
A
The data shows that the cells started with aerobic respiration, but changed to
anaerobic respiration when the oxygen level decreased in the body.
B
The data shows that the cells started with anaerobic respiration, but changed to
aerobic respiration when the oxygen level increased in the body.
C
The data shows that the cells started with aerobic respiration, but changed to
anaerobic respiration when the oxygen level increased in the body.
D The data shows that the cells started with anaerobic respiration, but changed to
aerobic respiration when the oxygen level decreased in the body.
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87
Which statement accurately
89
A scientist makes a hypothesis and
describes the role of key organelles
then conducts an experiment. The
in energy transfer? scientist discovers that the
A
Energy is captured and stored in
experiment does not support the
the nucleus and released in the
claim. What should the scientist do?
chloroplast.
A
B
achieve the expected outcome
Energy is captured and stored in
the nucleus and released in the
B
mitochondria.
C
Change the experiment to
Alter the results, assuming there
were errors during the procedure
Energy is captured and stored in
C
the chloroplast and released in
Run more trials to see if the
results are the same each time
the mitochondria.
D Change the hypothesis to a
D Energy is captured and stored in
theory
the mitochondria and released in
the chloroplast.
90
Which statement best describes a
testable hypothesis?
A
It is an assumption which
includes a value judgment by the
88
experimenter.
Students conducted a lab using four
test tubes, an agar solution, tin foil,
B
It is an expression of a
and diluted pond water. Which of
relationship between observable
these materials should be cleaned
and measurable variables.
and stored for reuse?
A
tin foil
B
test tube
C
agar solution
C
It is a statement that has no
basis for comparison.
D It is a general explanation based
on large amounts of collected
data.
D diluted pond water
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91
Science has limitations, because —
A
93
Before beginning an experiment, the
it cannot explain things that are
teacher reminds the students how
outside the realm of science, as
to use the safety equipment shown
they deal with phenomena that
below.
are not scientifically testable
B
it can only make decisions
regarding moral judgments that
individual people struggle with
C
it is only allowed to make
decisions about how to apply
science
D investigations that don't reach a
firm conclusion are useless
92
Which material should be disposed of
after a lab, rather than being reused
or recycled?
A
Test tube that had held salt
water
B
Cotton swab used to collect
cheek cells
C
Scalpel used to dissect plant
specimens
D Large opened bottle of rubbing
Which of the following pieces of
safety equipment is most likely
needed for this lab?
A
helmet
B
goggles
C
heavy gloves
D fire extinguisher
alcohol
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94
Science uses evidence to construct testable explanations and predictions of natural
phenomena, as well as the knowledge generated through this process. As new
technology is created, physical, mathematical, and conceptual models sometimes
are changed. Why is this?
A
The new technology may uncover more in-depth and accurate information than
what was previously understood by scientists.
B
Science only allows certain ideas to be studied based on the evidence of their
findings. The changes in theory that are made are based solely on these ideas.
C
The world is dynamic; as it changes, so do scientific beliefs.
D Each new generation of scientists has different ideas. Experiments and the
thoughts behind the experiments from past scientists are usually not considered
important.
95
You are testing food solutions for
96
Students in biology lab examined
carbohydrates, proteins, and lipids. cells under a microscope. After the
Some of the tests require a hot
lab, the glass slides holding the cells
plate and glassware. What safety
should be –
precaution should be observed in
A
disposed of in the trash
B
washed in the sink and reused
C
washed in the sink and discarded
this situation?
A
Wait at least 60 minutes after
testing before touching hot
glassware.
B
D disposed of in a special container
Use maximum heat setting for
testing all solutions.
C
Use only heat-resistant
glassware without cracks.
D Continue heating solutions until
all solvent has evaporated.
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97
Under what laboratory conditions are these precautions applicable?
I. Wear gloves, aprons, and goggles. II. Work in a well-ventilated area.
III. Use caution with sharp objects.
A
Observing live specimens under a stereoscope
B
Dissecting preserved specimens
C
Classifying specimens with a dichotomous key
D Testing unknown substances using chemicals
98
To learn about airborne bacteria,
students leave four open Petri dishes
filled with agar sitting on a table. At
the end of the day, the dishes are
covered and then incubated at 38ºC
for several days. The most
important reason to wear latex
gloves when handling the Petri
dishes is to keep from –
A
spreading bacteria to other Petri
dishes in the lab area
B
being poisoned by the agar in the
Petri dishes
C
contaminating the Petri dishes
with skin-borne bacteria
D exposing the nutrient agar to oils
that could denature the agar
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99
Use the information below to answer the question.
MSDS Ammonium Sulfate Fertilizer
components: ammonium sulfate
boiling point: N/A
specific gravity: 1.77
evaporation rate: not determined
reactivity in water: will not evolve flammable or toxic gas
explosion hazard: explosion hazards when mixed with potassium chlorate,
potassium nitrate, or potassium nitrite
exposure: inhalation of dust and vapor can cause throat irritation; contact with the
skin can cause irritation; contact with eyes can cause pain; ingestion can cause
nausea and vomiting
other: decomposes at 235º; not a carcinogen
Students are preparing potted plants for an experiment. Their workspace contains
only a bag of ammonium sulfate fertilizer, a bag of soil, seeds, clay pots, and a sink.
Which of the following pieces of safety equipment should be available for this
experiment?
A
fire extinguisher
B
eyewash station
C
bucket of sand
D baking soda
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100
What equation describes the process occurring at B?
A
H2 O + CO2 → C6 H12O6 + H2 O
B
H2 O + CO2 → C6 H12O6 + O2
C
H2 O + O2 → C6 H12O6 + CO2
D O2 + C6 H12O6 → H2 O + CO2
101
Which of the following lists two
requirements needed for the
reactions of both photosynthesis
and aerobic respiration?
A
molecular oxygen and enzymes
B
molecular oxygen and carbon
dioxide
C
electron transport system and
enzymes
D electron transport system and
molecular carbon dioxide
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