Biology 2107/03
Fall 2000
First Examination
Version A
Name
Be sure to put your name
on the mark-sense sheet as well
Directions:
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Be sure to put your name on the mark-sense sheet and on the exam
booklet. Both must be turned in at the end of the period.
Indicate the correct version letter of your exam in the upper right
corner of the mark-sense sheet in the box marked “KEY ID.”
Each questions has only one correct answer. When a group of choices
is used for more that one question, a choice may be used more than
once.
You may write in the exam booklet, but only the mark-sense sheet will
be graded. No other paper, scratch paper, etc., may be used.
Students must turn in the exam before leaving the room for any
reason. A student may not continue working on the exam after having
left the room.
Multiple Choice. 50 questions, 2 pt each.
1.
In the hierarchy of structural organization in living systems, a
tissue
(a)
is a collection of distinctively different types of cells that work
cooperatively to accomplish a specific task.
is a collection of very similar (or identical cells) cells that have
differentiated for a specific purpose.
is a collection of membrane-bound structures that collectively form
the structure of a cell.
is a collection of monomer units that are linked to form a single
covalently-bound molecule.
can refer to any level of structural organization that has a defined
function or purpose.
(b)
(c)
(d)
(e)
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2.
In the hierarchy of structural organization in living systems, an
organ
(a)
is a collection of distinctively different types of cells that work
cooperatively to accomplish a specific task.
is a collection of very similar (or identical cells) cells that have
differentiated for a specific purpose.
is a collection of membrane-bound structures that collectively form
the structure of a cell.
is a collection of monomer units that are linked to form a single
covalently-bound molecule.
can refer to any level of structural organization that has a defined
function or purpose.
(b)
(c)
(d)
(e)
3.
The structural boundary that defines the “outside” of all cell types
is the
(a)
(b)
(c)
cell wall
outer limits
basal lamella
(d)
(e)
cytoperiphery
plasma membrane
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The following choices are used for questions 4 – 6.
(a)
(b)
(c)
reproduction
genetic encoding
metabolism
(d)
(e)
evolution
regulated transport
4.
This is the best term to describe the processes by which cells
assimilate energy and raw materials from their environment.
5.
This is the best term to describe changes in living organisms that
result in increased ability to survive and increased diversity of
species.
6.
This is the best term to describe the mechanism in which the
information for protein structure is contained in the sequence of
nucleotides in a nucleic acid molecule.
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The following information pertains to questions 7 – 9.
In an experiment, a botanist wishes to examine the effect of a new
fertilizer on the growth of tomato seedlings. She has two groups of plants
growing in flowerpots: one group in which the fertilizer has been added to
the potting soil, and a second group in which fertilizer has not been
added. All other conditions, such as soil moisture, temperature, amount
of light, etc., are identical for both groups of plants. Each day, the
botanist measures the heights of the plants.
7.
Which of the following represents the independent variable of this
experiment?
(a)
(b)
(c)
(d)
(e)
Soil moisture
Amount of Light
Presence or Absence of Fertilizer
Plant Height
More than one of the above
8.
Which of the following represents the dependent variable of this
experiment?
(a)
(b)
(c)
(d)
(e)
Soil moisture
Amount of Light
Presence or Absence of Fertilizer
Plant Height
More than one of the above
9.
Which of the following represents the controlled variable of this
experiment?
(a)
(b)
(c)
(d)
(e)
Soil moisture
Amount of Light
Presence or Absence of Fertilizer
Plant Height
More than one of the above
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The following choices are used for questions 10 - 14.
(a)
(b)
(c)
(d)
(e)
Protons
Electrons
Neutrons
More than one of the above
None of the above
10.
This structure is found in important biological monomers, such as
glucose.
11.
Consider these two isotopes of oxygen, oxygen-16 and oxygen-18.
An atom of oxygen-16 differs from an atom of oxygen-18 in the
numbers of these particles.
12.
The atomic number of an atom is defined as the number of this
type of particle.
13.
The mass number of an atom is defined as the number of neutrons
plus the number of this type of particle.
14.
Interactions between two different atoms are mediated primarily by
this type of particle (specifically, those particles in the “valence
shells” of the atoms).
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The following choices are used for questions 15 - 22.
(a)
(b)
(c)
(d)
Ionic bonding
Covalent bonding
Polar Interactions
Hydrophobic Interactions
15.
This is the best term to describe the interaction between two water
molecules in a glass of water.
16.
This is the best term to describe the interactions between sodium
and chloride ions in a salt crystal.
17.
This term refers to the “sharing” of electrons between two atoms.
18.
In an aqueous solution or suspension, this type of interaction is
typically the strongest and most stable.
19.
This is the best term to describe a peptide bond.
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20.
This is the best term to describe a glycosidic bond.
21.
Hydrogen bonding, such as the type found in the secondary
structures of proteins, is a specialized form of this bonding.
22.
This is the best term to describe the interactions between oil
molecules that have floated to the top of an oil-water mixture.
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23. Which of the following statements is true?
(a)
(e)
Carbon and silicon are both capable of forming four covalent bonds
per atom.
Silicon is much less abundant on earth than carbon is.
Both carbon dioxide and silicon dioxide are highly soluble in water.
Silicon-silicon bonds are much more stable than silicon-oxygen
bonds.
More than one of the above.
24.
A substance with a pH greater than seven
(a)
(b)
is acidic, and has a greater [H+] than a neutral substance.
is basic (alkaline), and has a greater [H+] than a neutral
substance.
is acidic, and has a lower [H+] than a neutral substance.
is basic (alkaline), and has a lower [H+] than a neutral substance.
None of the above are true.
(b)
(c)
(d)
(c)
(d)
(e)
25.
Which of the following best describes the structure of a water
molecule?
(a)
A central oxygen bonded to two hydrogens, with all three atoms in
a straight line.
A central hydrogen bonded to another hydrogen and to an oxygen,
with all three atoms in a straight line.
A central oxygen bonded to two hydrogens, with an angle of about
110 between the two hydrogens.
A central hydrogen bonded to another hydrogen and to an oxygen,
with an angle of about 110 between the second hydrogen and the
oxygen.
(b)
(c)
(d)
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The following choices are used for questions 26 - 31.
(a)
(b)
(c)
(d)
(e)
Hydrolysis Reaction
Condensation (Dehydration) Reaction
Hydrophilic
Hydrophobic
Heat Capacity
26.
This is the best term to describe the joining of two monomers to
form a dimer.
27.
This is the best term to describe the breakdown of peptidoglycan
by lysozyme.
28.
This is the best term to describe the formation of a triglyceride
from a glycerol molecule and three fatty acids.
29.
This is the best term to describe how a triglyceride would behave if
you mixed it with water.
30.
This is the best term to describe why, when you go to the beach in
early spring, the water may be still very cold even though the air
temperature is much warmer.
31.
This is the best term to describe the formation of a peptide bond.
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The following choices are used for questions 32 - 36.
(a)
(b)
(c)
(d)
(e)
monosaccharide
disaccharide
polysaccharide
more than one of the above
none of the above
32.
This is a carbohydrate.
33.
Large amounts of –OH groups are typically found in the molecules
of this type of substance.
34.
Cellulose and peptidoglycan are examples of this type of
substance.
35.
Lysozyme and hemoglobin are examples of this type of substance.
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36.
A molecule of this substance will be classified according to the
number of carbons it contains: triose, tetrose, pentose, hexose, etc.
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37. Which of the following is a common feature of lipids?
(a)
(b)
(c)
(d)
(e)
All lipids have glycerol in their structures.
All lipids have fatty acids in their structures.
All lipids have hydrophobic regions in their structures.
No lipids have hydrophilic regions in their structures.
More than one of the above is true.
38.
Which of the following statements is true?
(a)
Fatty acids with a greater degree of saturation have fewer C=C
double bonds and form glycerides have higher melting points.
Fatty acids with a greater degree of saturation have more C=C
double bonds and form glycerides have higher melting points.
Fatty acids with a greater degree of saturation have fewer C=C
double bonds and form glycerides have lower melting points.
Fatty acids with a greater degree of saturation have more C=C
double bonds and form glycerides have lower melting points.
(b)
(c)
(d)
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The following choices are used for questions 39 through 42.
(a)
(b)
(c)
(d)
primary structure of protein
secondary structure of protein
tertiary structure of protein
quaternary structure of protein
39.
The formation of an ionic bond between two amino acids in the
same polypeptide chain, one at one end of the chain and one at the
other end of the chain, is an example of this level of structure.
40.
The formation of an ionic bond between two amino acids in
different polypeptide chains (for example, between the different
subunits of the protein hemoglobin) is an example of this level of
structure.
41.
Alpha helix and beta sheet are examples of this level of structure.
42.
This level of structure is the amino acid sequence of a protein.
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The following choices are used for questions 43 - 45.
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(a)
(b)
(c)
This is a property of prokaryotic cells.
This is a property of eukaryotic cells.
This could be a property of either prokaryotic or eukaryotic
cells.
43.
Extensive internal membrane systems, including complex
organelles having double membranes.
44.
Plasma membranes containing folds that carry out metabolic
processes of respiration and photosynthesis.
45.
A single chromosome, found in a “nucleoid” region, that directs the
synthesis of the cell’s RNA.
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The following choices are used for questions 46 – 50.
(a)
(b)
(c)
(d)
(e)
nucleus
mitochondrion
chloroplast
endoplasmic reticulum
Golgi apparatus
46.
The inner membrane of this organelle contains folds known as
cristae.
47.
Proteins destined for secretion are synthesized on ribosomes
attached to the membrane of this organelle.
48.
This organelle is the site of cellular respiration (the process by
which oxygen is used to conserve metabolic energy in the form of
ATP).
49.
Most of the inside of this organelle is filled with chromatin.
50.
Lysosomes are membrane-bond packets, filled with hydrolytic
enzymes, that are formed by this organelle.
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