Download EVPP 110 Lecture – Exam #1 - Practice Questions I. Levels of

EVPP 110 Lecture – Exam #1 - Practice Questions
I.
II.
III.
Levels of organization of life
1. Select the largest level of organization among the following:
a. organ
b. organ system
c. organism
d. tissue
2. Select the smallest level of organization among the following:
a. community
b. organ system
c. organism
d. population
3. Life is organized in a hierarchical fashion. Which of the following sequences
illustrates that hierarchy as it goes upward?
a. ecosystem, population, organ system, cell, community, molecule, organ,
organism
b. cell, molecule, organ system, organ, population, organism, ecosystem,
community
c. organism, organ system, population, organ, community, cell ecosystem,
molecule
d. molecule, cell, organ, organ system, organism, population, community,
ecosystem
e. ecosystem, molecule, cell, organism, organ system, organ, community
Characteristics of Life
1. Which of the following is (are) properties of life?
a. a precise structural organization
b. the ability to take in energy and use it
c. the ability to respond to stimuli from the environment
d. the ability to reproduce
e. all of the above
Scientific Method
1. An hypothesis
a. is the same as a theory
b. is a tentative explanation for scientific phenomenon
c. is an explanatory idea that is broad in scope and supported by a large body of
evidence
d. is a widely accepted idea about a phenomenon
e. a, c, and d
2. In order to be scientifically valid, a hypothesis must be
a. phrased as a question
b. based on faith
c. testable
d. falsifiable
e. both c and d
3. A generalization made in the scientific method is a
a. hypothesis
b. theory
c. law
d. observation
4. An experiment usually has an experimental group and a ________ group.
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EVPP 110 Lecture – Exam #1 - Practice Questions
IV.
a. non-experimental
b. theoretical
c. control
d. deductive
5. In the scientific method, a well-supported hypothesis may become a
a. observation
b. control group
c. theory
d. statement
Atoms and molecules
1. Elements exist in discrete packages called
a. atoms
b. cells
c. molecules
d. tissues
2. Select the subatomic particle with the least amount of mass.
a. proton
b. neutron
c. nucleus
d. electron
3. An atom has six protons and eight neutrons. Its atomic number is
a. two
b. six
c. eight
d. fourteen
4. Three hydrogen atoms have respective weights of 1, 2, and 3. Their relationship is
that they are
a. isomers
b. isotopes
c. isobars
d. molecules
5. An atom has an atomic mass of 23 and an atomic number of 11. The number of
neutrons in its nucleus is
a. 1
b. 2
c. 11
d. 12
6. The atomic number of an element is 16. The arrangement of electrons through its
energy levels is
a. 2 – 6
b. 2 – 8
c. 2 – 8 – 6
d. 2 – 6 – 8
7. An element has an atomic number of nine. The number of electrons in its outer
energy level is
a. 1
b. 4
c. 7
d. 8
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EVPP 110 Lecture – Exam #1 - Practice Questions
8. There are ______ total atoms in the water molecule.
a. 2
b. 3
c. 4
d. 5
9. Which substances are placed on the left in a chemical equation?
a. products
b. reactants
c. enzymes
d. formulas
10. Which electron arrangement is found in the energy levels of an inactive element?
a. 2 – 1
b. 2 – 2
c. 2 – 6
d. 2 – 8
11. Which type of chemical bond results from electron sharing?
a. hydrogen
b. ionic
c. covalent
d. yields
12. An element has an atomic number of 6. The number of electrons in its outer
energy level is
a. 1
b. 2
c. 4
d. 6
13. Which atomic number is found in an atom tending to become a cation?
a. 11
b. 15
c. 16
d. 17
14. Electronegativity is a measure of an atom’s
a. attraction for electrons
b. attraction for protons
c. repulsion for electrons
d. repulsion for electrons
15. Each describes a hydrogen bonds except
a. strong bond
b. important biologically
c. may be between two molecules
d. formed by water
16. Each is a property of water except
a. exhibits cohesive forces
b. exhibits adhesive forces
c. helps to maintain a stable temperature
d. maximum density is at 0 degrees Celsius
17. An acid
a. donates H+ in solution
b. is the solvent for water
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EVPP 110 Lecture – Exam #1 - Practice Questions
c. raises the pH of a solution
d. cannot ionize
18. Buffers
a. make solutions acidic
b. make solutions basic
c. minimize pH changes
d. have no effect on pH
19. Matter
a. is what life is composed of
b. occupies space
c. has mass
d. is composed of elements
e. all of the above
20. A compound (or molecule)
a. is a pure element
b. is less common than a pure element
c. contains two or more elements in s fixed ratio
d. is exemplified by sodium
e. is a solution
21. The nucleus of an atom contains
a. protons and neutrons
b. protons and electrons
c. only neutrons
d. only protons
e. only electrons
22. A(n) _____ is a portion of an atom that carries ______.
a. proton…a negative charge
b. electron…a positive charge
c. neutron…a positive charge
d. proton…a positive charge
e. electron…no electrical charge
23. The atom sodium contains 11 electrons, 11 protons, and 12 neutrons. What is the
atomic mass of sodium?
a. 0
b. 11
c. 22
d. 23
e. 34
24. Typically, nitrogen atoms are composed seven electrons, seven protons, and
seven neutrons. An isotope of nitrogen could
a. be positively charged
b. be negatively charged
c. have more than seven electrons and more than seven protons
d. have more than seven each of electrons, protons, and neutrons
e. have more than seven neutrons
25. The atomic number of an atom is
a. the number of protons in the atom
b. the number of electrons in the atom
c. the number of neutrons in the atom
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EVPP 110 Lecture – Exam #1 - Practice Questions
d. the number of protons, electrons and neutrons in the atom
e. the net electrical charge of the atom
26. When full, the innermost electron shell of an atom contains ____ electrons, and the
outermost shell contains _____ electrons.
a. 2…2
b. 2…8
c. 4…8
d. 8…2
e. 8…8
27. The electrons of an atom are found
a. in the atomic nucleus
b. bound to protons
c. in shells
d. both a and b
e. all of the above
28. A(n) ________ forms when two atoms share electrons.
a. ion
b. polar covalent bond
c. covalent bond
d. ionic bond
e. either b or c
29. Table salt (NaCl) is formed when
a. chlorine gives an electron to sodium
b. a hydrogen bond forms between sodium and chlorine
c. sodium and chlorine share electrons to form a bond
d. sodium crystals combine with chlorine crystals
e. none of the above
30. What is the fundamental difference between covalent and ionic bonding?
a. In a covalent bond, the partners have identical electronegativity; in an ionic
bond, one of them is more electronegative
b. In a covalent bond, the partners share a pair of electrons; in an ionic bond, one
partner captures an electron from the other
c. In a covalent bond, both partners end up with filled outer electron shells; in ionic
bonding, one partner does and the other does not
d. Covalent bonding involves only the outer electron shell; ionic bonding also
involves the next inner shell
e. Covalent bonds form between atoms of the same element; ionic bonds form
between atoms of different elements
31. As ice melts,
a. hydrogen bonds are broken
b. water molecules become less tightly packed
c. the water becomes less dense
d. all of the above
32. Why can a glass be filled with water to the point where some of the water is above
the rim of the glass, yet the water does not overflow the glass?
a. Water molecules exhibit cohesion.
b. The polar covalent bonds of water prevent overflow.
c. The ionic bonds of water prevent overflow.
d. It is an optical illusion; the water is actually not above the rim.
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EVPP 110 Lecture – Exam #1 - Practice Questions
e. The pressure of gravity on the water prevents overflow.
33. The ability of water molecules to form hydrogen bonds with other water molecules
is critical to
a. evaporative cooling of skin surfaces
b. the movement of water from the roots of a tree to its leaves
c. the milder temperatures of coastal regions when compared to inland areas
d. the ability of certain insects to walk on the surface of water
e. all of the above
40. Water molecules stick to other water molecules because
a. water molecules are neutral, and neutral molecules are attracted to each other
b. hydrogen bonds form between hydrogen atoms of one water molecule and the
oxygen atoms of other water molecules
c. covalent bonds form between the hydrogen atoms of one water molecule and
the oxygen atoms of other water molecules
d. the hydrogen atoms of adjacent water molecules are attracted to one another
e. the oxygen atoms of adjacent water molecules are attracted to one another
34. _____________ are weak bonds that are not strong enough to hold atoms together
to form molecules but are strong enough to form bridges between molecules.
a. ionic bonds
b. covalent bonds
c. polar covalent bonds
d. hydrogen bonds
e. anionic bonds
35. A water molecule (H – O – H) is held together by
a. an ionic bond
b. a single covalent bond
c. a double covalent bond
d. a polar covalent bond
e. hydrogen bonds
36. The hydrogen atoms of a water molecule are bonded to the oxygen atom by
__________ bonds, whereas neighboring water molecules are held together by
___________ bonds.
a. hydrogen…ionic
b. hydrogen…polar covalent
c. polar covalent…hydrogen
d. ionic…covalent
e. polar covalent…ionic
44. The oxygen atoms of each water molecule
a. are more positively charged than the hydrogen atoms
b. attract electrons less strongly than the hydrogen atoms
c. are more electronegative that the hydrogen atoms
d. are electrically neutral
e. are attracted to the negatively charged atoms of other molecules
45. Which of the following is not a characteristic of chemical reactions?
a. Chemical reactions involve the making and breaking of chemical bonds.
b. Some chemical reactions create electrons; other destroy them.
c. The atoms of the reactants are exactly the same as the atoms of the products.
d. The reactants contain the same number of atoms as the products.
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EVPP 110 Lecture – Exam #1 - Practice Questions
e. Although the atoms of a reaction’s reactants and products are identical to each
other, their molecular formulae differ.
46. In the equation 2H2 + O2 → 2H2 O, the H2 molecules are _______ and the H2 O
molecules are ___________.
a. reactants…products
b. products…reactants
c. reactants…reactants
d. products…products
e. none of the above
47. Bases
a. donate H+ ions to solutions
b. accept H+ ions from solutions
c. donate OH- ions to solutions
d. accept OH- ions from solutions
48. A solution with a pH of 7
a. is strongly acidic
b. is weakly acidic
c. is neutral
d. is weakly basic
e. is strongly basic
49. A buffer
a. is an acid that is used to offset overly basic conditions in the body
b. is a base that is used to offset overly acid conditions in the body
c. donates OH- ions when conditions become too acid and accepts OH- ions when
conditions become too basic
d. donates H+ ions when conditions become too basic and accepts H+ ions when
conditions become too acidic
e. donate OH- ions when conditions become too basic and accepts OH- ions when
conditions become too acidic
50. A solution with a pH of 1
a. is strongly acidic
b. is weakly acidic
c. is neutral
d. is weakly basic
e. is strongly basic
51. Which of the following statements about pH is (are) true?
a. pH is a measure of hydrogen ion concentration.
b. A single unit change on the pH scale is equivalent to a tenfold change in
hydrogen ion concentration.
c. An increase in hydrogen ion concentration means a decrease in pH scale units.
d. All of the above are true.
e. None of the above are true.
52. What would be the consequences of ice being denser than water?
a. There would be no life on land.
b. There would be no aquatic life.
c. Life would not have evolved as it has, if at all.
d. Cooling a soda would be more difficult.
e. There would be no consequences resulting from ice being denser than water.
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EVPP 110 Lecture – Exam #1 - Practice Questions
V.
Organic compounds
1. An atom of carbon can form as many as _____ covalent bonds.
a. 1
b. 2
c. 3
d. 4
2. A polymer is
a. subunit of a larger molecule
b. giant molecule
c. functional group
d. water molecule
3. Which two phrases best describe a dehydration synthesis reaction?
a. Loss of a water molecule, synthesis of a polymer
b. Loss of a water molecule, breakdown of a polymer
c. Addition of a water molecule, synthesis of a polymer
d. Addition of a water molecule, breakdown of a polymer
4. Which two phrases best describe a hydrolysis reaction?
a. Loss of a water molecule, synthesis of a polymer
b. Loss of a water molecule, breakdown of a polymer
c. Addition of a water molecule, synthesis of a polymer
d. Addition of a water molecule, breakdown of a polymer
5. Each is a type of carbohydrate except
a. sugar
b. starch
c. cellulose
d. cholesterol
6. Which type of molecule is not a building block for a macromolecule?
a. amino acid
b. fatty acid
c. glucose
d. protein
7. Saturated fatty acids contain the maximum number of _________ atoms per
molecule.
a. C
b. H
c. N
d. O
8. The sequence of amino acids in a polypeptide represents its ________ structure.
a. primary
b. secondary
c. tertiary
d. quaternary
9. Hydrogen bonds between R groups of amino acids in a polypeptide determine its
____________ structure.
e. primary
f. secondary
g. tertiary
h. quaternary
10. Each is a component of a nucleotide except
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EVPP 110 Lecture – Exam #1 - Practice Questions
a. nitrogen base
b. fatty acid
c. five-carbon sugar
d. phosphate group
11. Characteristics of carbon that contribute to its ability to form an immense diversity
of organic molecules includes its
a. tendency to form covalent bonds
b. ability to bond with up to four other atoms
c. capacity to form single and double bonds
d. ability to bond together to form extensive, branched, or unbranched “carbon
skeletons”
e. all of the above
12. Hydrocarbons
a. are inorganic compounds
b. are composed of carbon atoms that are attached to hydrogen skeletons
c. contain only carbon and hydrogen atoms
d. consist of atoms linked exclusively by single bonds
e. all of the above
13. Organic compounds
a. can only be synthesized in a laboratory
b. always contains nitrogen
c. always contain carbon
d. are synthesized by cells
e. both c and d
14. Monosaccharides can be joined together by a process called dehydration
synthesis. Which of the following statements is (are) true about this process?
a. One monomer loses a hydrogen atom, and the other loses a hydroxyl group
b. Electrons are shared between atoms of the joined monomers
c. H2O is formed as the monomers are joined
d. Covalent bonds are formed between monomers
e. All of the above are true
15. The results of a dehydration synthesis can be reversed by
a. a condensation reaction
b. a hydrolysis reaction
c. digestion
d. polymerization
e. both b and c
16. Which list below consists only of polymers?
a. monosaccharides, amino acids, nucleic acids, lipids
b. proteins, lipids, nucleic acids, monosaccharides
c. proteins, lipids, nucleic acids, polysaccharides
d. proteins, lipids, nucleotides, monosaccharides
e. polysaccharides, lipids, amino acids, nucleic acids
17. Hydrophobic compounds are
a. repelled by lipids
b. attracted to vinegar
c. repelled by water
d. attracted to water
e. attracted to hydrophilic compounds
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EVPP 110 Lecture – Exam #1 - Practice Questions
18. A triglyceride
a. consists of three fatty acids attached to a glycerol
b. is hydrophobic
c. plays a role in energy storage
d. is a type of fat
e. all of the above
19. Fatty acids with double bonds between some of their carbons are said to be
a. unsaturated
b. saturated
c. completely hydrogenated
d. triglycerides
e. monoglycerides
20. A major type of lipid found in cell membranes is
a. steroids
b. triglycerides
c. phospholipids
d. glycerol
e. waxes
21. Enzymes
a. are proteins
b. function as organic catalysts
c. regulate chemical reactions in a cell
d. have structures that correspond to their function
e. all of the above
22. Proteins differ from one another because
a. the peptide bonds linking amino acids differ from protein to protein
b. the sequence of amino acids in the polypeptide chain differs from protein to
protein
c. each protein contains its own unique sequence of sugar molecules
d. the number of nucleotides found in each protein varies from molecule to
molecule
e. the number of nitrogen atoms in each amino acid varies
23. Amino acids can be distinguished from one another by
a. the number of R groups found on the amino acid molecules
b. the chemical properties of their R groups
c. the type of bond between the R group and the rest of the amino acid molecule
d. the chemical properties of their amino and carboxyl groups
e. all of the above
24. Glucose molecules are to starch as _________ are to proteins.
a. oils
b. amino acids
c. fatty acids
d. waxes
e. lards
25. Which of the following may be affected by the denaturation of a protein?
a. the shape of the protein
b. the function of the protein
c. the solubility of the protein in water
d. the number of amino acids in the protein
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EVPP 110 Lecture – Exam #1 - Practice Questions
VI.
e. a, b, and c
26. Which of the following factors can result in the denaturation of a protein?
a. heat
b. changes in pH
c. chemicals that destroy hydrogen bonds
d. changes in salt concentration
27. The _________ structure of a protein consists of a chain of amino acids assembled
in specific order.
a. primary
b. secondary
c. tertiary
d. quaternary
e. none of the above
28. Which of the following is an example of secondary structure in a protein?
a. a particular amino acid sequence
b. an alpha helix
c. a globular shape
d. a pleated sheet
e. both b and d
29. The tertiary structure of a polypeptide refers to
a. its size
b. the presence of pleated sheets
c. the amino acids its made of
d. its three-dimensional structure
e. the number of R groups it contains
30. Nucleotides
a. contain nitrogenous bases
b. contain sugar molecules
c. contain phosphate groups
d. can be linked to form a double helix
e. all of the above
Cellular Organization
1. Each describes the plasma membrane except
a. surface membrane
b. unselective barrier
c. separates two environments
d. common structure to cells
2. The internal structures of cells are called
a. organs
b. organelles
c. tissues
d. microspheres
3. Eukaryotes have cells with regions bound by
a. nucleii
b. genes
c. membranes
d. water
4. Each is true of prokaryotic cells except
a. found among bacteria
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EVPP 110 Lecture – Exam #1 - Practice Questions
b. found among cyanobacteria
c. well-defines nucleus
d. smaller than eukaryotic
5. The structure unique to a plant cell but not to an animal cell is the
a. cell membrane
b. cell wall
c. nucleus
d. mitochondria
6. Which structure can trap and convert light energy?
a. chloroplast
b. mitochondria
c. nucleus
d. cytoplasm
7. Which structure is an energy-converting organelle?
a. mitochondrion
b. lysosome
c. nucleus
d. Golgi complex
8. Which of the following is not found in bacteria?
a. a true, membrane-bound nucleus
b. a plasma membrane (cell membrane)
c. a cell wall
d. a capsule
e. ribosomes
9. Cells that lack a membrane-bound nucleus are _________ cells.
a. plant
b. animal
c. prokaryotic
d. eukaryotic
e. fungal
10. Mitochondria differ from chloroplasts in that
a. mitochondria convert solar energy to chemical energy, whereas chloroplasts
convert one form of chemical energy to another
b. mitochondria contain three different membrane-bound compartments, whereas
chloroplasts contain two
c. mitochondria contain membrane folds called cristae, whereas chloroplasts
contain dislike vesicles in stacks called grana
d. mitochondria are not found in plants, whereas chloroplasts are not found in
animals
e. mitochondria produce glucose, whereas chloroplasts break glucose down
11. The function of chloroplasts is
a. cellular respiration
b. intracellular transport of proteins
c. lipid synthesis
d. photosynthesis
e. intracellular digestion
12. The function of mitochondria is
a. cellular respiration
b. intracellular transport of proteins
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EVPP 110 Lecture – Exam #1 - Practice Questions
c. lipid synthesis
d. photosynthesis
e. intracellular digestion
13. All cells on Earth
a. are enclosed in a membrane that maintains internal conditions different from the
surroundings
b. have DNA as the genetic material
c. can interconvert forms of energy
d. can interconvert chemical materials
e. all of the above
6. Cells release energy from molecules such as glucose in a process very similar to
inhalation of air and exhalation of carbon dioxide by humans. This process is known as
cellular
a. oxidation
b. reduction
c. respiration
d. photosynthesis
e. radiation
7. Life’s ultimate source of energy is derived from
a. plants
b. water
c. air
d. cells
e. the sun
8. As energy is being reconverted through many forms, it is continuously lost as
a. electricity
b. light
c. sound
d. heat
e. chemical energy
9. Molecules that act as catalysts in biological systems are
a. enzymes
b. ATP
c. cofactors
d. coenzymes
e. genes
10. In an enzyme catalyzed reaction the reactant is called the
a. ribosome
b. substrate
c. catalyst
d. end-product
e. activator
11. When the substrate is bound to the enzyme, the shape of the enzyme may change
slightly, leading to
a. a great range of possible catalytic activities
b. a greater supply of activation energy
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EVPP 110 Lecture – Exam #1 - Practice Questions
c. a better induced fit
d. more permanent binding through intimate total contact
12. At the conclusion of an enzyme catalyzed reaction
a. its active site closes up and cannot bind to more substrate
b. it frees itself from the product and is ready to be reused
c. it must be resynthesized from its amino acids
d. it must be transported from outside the cell
13. The ability of an enzyme to catalyze a reaction can be affected by chemical and physical
factors such as
a. temperature
b. pH
c. salt concentration
d. binding of specific regulatory molecules
e. all of the above
14. Which of the following organisms are autotrophs?
a. some bacteria
b. algae
c. plants
d. some protozoans
e. all of the above
15. At least 90% of organisms on the earth are heterotrophs. Examples include all of the
following except
a. animals
b. most protists
c. fungi
d. plants
e. most eubacteria
1.
Spontaneous origin proponents hypothesize that life evolved from inanimate matter. According to this
view, the force leading to life was
A.
selection
B.
resistance to radiation
C.
ability to live on land
D.
ability to reproduce
E.
all of the above
18.
The oldest microfossils are of
A.
bacteria
B.
eukaryotes
C.
insects
D.
pollen grains
E.
small animals
19.
Life apparently originated on earth about
A.
1 million years ago
B.
6000 years ago
C.
4.5 billion years ago
D.
8 billion years ago
E.
3.5 billion years ago
20.
It is generally agreed that the early earth's reducing atmosphere contained
A.
carbon dioxide, methane, nitrogen
B.
hydrogen sulfide, water, ammonia
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EVPP 110 Lecture – Exam #1 - Practice Questions
C.
D.
E.
more than traces of free oxygen
a, b, and c are true
only a and b are true
21.
Scientists believe that our atmosphere has progressively changed as some living organisms began to
harness sunlight energy to split water molecules to form complex carbon molecules. This activity led to
an increase in
A.
water
B.
ammonia
C.
oxygen
D.
ozone
E.
carbon dioxide
22.
The first step in the origin of life is thought to be the formation of organic compounds from atmospheric
components, using all of the following forms of energy except
A.
metabolic energy from living organisms
B.
lightning
C.
radioactive decay
D.
solar radiation
E.
volcanic eruption
26.
The characteristics of life include all of the following except
A.
complexity
B.
death
C.
multicellularity
D.
sensitivity to environment
E.
inheritance/heredity
27.
All living organisms possess
A.
photosynthesis
B.
cellular organization
C.
growth and metabolism
D.
reproduction and heredity
E.
only b, c, and d
29.
The most primitive bacteria that exist today are
A.
amoeba
B.
eubacteria
C.
archaebacteria
D.
algae
E.
nitrogen-fixing bacteria
32.
An oxygen concentration of 1% of 1 billion years ago increased to the present level of 21% because of
photosynthetic activity of
A.
fungi
B.
cyanobacteria
C.
plants
D.
protists
E.
animals
1. The biological name of an organism in the binomial system contains two parts, the genus
and the
A. species
B. phylum
C. kingdom
D. order
E. family
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EVPP 110 Lecture – Exam #1 - Practice Questions
2. Since any one group fits within a more inclusive group, the biological classification
systems are
A. evolutionary
B. hierarchical
C. inclusive
D. numerical
E.
programmed
3. Of the following, the correct order from largest, most inclusive group to smallest, most
specific group, is
A. species, genus, family, class, order
B. species, family, genus, class, order
C. class, genus, order, family, species
D. class, order, family, genus, species
E.
class, family, order, genus, species
15. The largest, most inclusive grouping in the classification scheme is
A. genus
B. family
C. kingdom
D. class
E.
order
16. The number of domains living organisms can be divided into is
A. 1
B. 2
C. 3
D.
4
E.
5
17. Though a diverse group, all archaebacteria share certain characteristics which are
A. lack peptidoglycan cell walls
B. possess very unusual lipids
C. contain characteristic ribosomal RNA sequences
D. some of their genes contain introns
E.
all of the above are true
18. Lacking one of the criteria to be strictly classified as living units and containing fragments
of eukaryotic genomes, the viruses are included in
A. bacteria
B. protists
C. yeasts
D.
prokaryotes
E.
none of the kingdoms
13) The _______________ is the liquid portion of a _______________ and the _____________
__ is the substance that is dissolved in the liquid.
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EVPP 110 Lecture – Exam #1 - Practice Questions
A)
B)
C)
D)
E)
solution....solvent....solute
solute....solvent....solution
solvent....solute....solution
solvent....soltuion....solute
solute....solution....solvent.
14) A solution with a pH of 7 is ________ whereas a solution with a pH of 1 is ____________
_.
A) weakly basic....weakly acidic
B) strongly acidic....strongly basic
C) strongly basic....weakly basic
D) weakly acidic....neutral
E) neutral....strongly acidic
Osmosis is an important process that has many effects on living things. Predict in each of the follo
wing cases, by writing In, Out, or None, whether water will enter the cell (In) or leave the cell (Out)
or whether there will be no net movement of water (None). Assume that the plasma membrane is pe
rmeable to water but not solutes.
Cell is placed in salt solution whose concentration is greater than cell contents.
Cell is placed in isotonic solution.
Solute concentration of cell is greater than solute concentration of surrounding fluid.
Cell is exposed to hypotonic solution.
Concentration of solutes in cytoplasm is equal to solute concentration of extracellular fluid.
38) Diffusion does not require the cell to expend energy. Therefore, diffusion is considered
a type of
A) exocytosis.
B) active transport.
C) passive transport.
D) phagocytosis.
E) endocytosis.
39) Osmosis can be defined as
A) the diffusion of water.
B) the diffusion of a solute.
C) the diffusion of nonpolar molecules.
D) endocytosis.
E) active transport.
For each of the elements below, fill in the blanks and sketch the atom, showing and labelling
the number and location of the neucleus, protons, neutrons, electron shells, and electrons.
Element
Symbol
Atomic
Number
Mass
Number
# of
Protons
# of
# of
Neutrons Electrons
17
EVPP 110 Lecture – Exam #1 - Practice Questions
Carbon12
C
Chlorine35
Cl
Oxygen16
O
Oxygen17
O
6
35
8
9
Write the 6 kingdoms of life discussed in lecture:
18
EVPP 110 Lecture – Exam #1 - Practice Questions
Write the 3 domains of life discussed in lecture:
There are four main classes of biological macromolecules. Most are polymers, assembled fro
m smaller monomers in a process called dehydration synthesis. Hydrolysis breaks the poly
mers back down into monomers. Write a "D" or an "H" in the blanks below to indicate whet
her each of the following relates to dehydration synthesis (D) or hydrolysis (H).
"D" or "H"
Produces wa ter as a by-product.
Water is used to break bonds between molecules.
Joins amino acids to form a protein.
Glycerol and fatty acids join this way to form a fat.
Occurs when polysacchradies are digested to form monosacchradies.
23) _____________ compounds are repelled by water whereas ______________ compounds a
re attracted to water.
A) hydrophillic....hydrophobic
B) hydrophillic....hydrophillic
C) hydrophobic....hydrophoobic
D) hydrophobic....hydrophillic
E) none of the above.
26) A phospholipid is composed of
A) one fatty acid molecule linked to one glycerol molecule and two phosphate groups
.
B) one glycerol molecule linked to three fatty acid molecules.
C) one glycerol molecule linked to one phosphate group and two fatty acid molecules
.
D) one fatty acid molecule linked to three glycerol molecules.
E) one glycerol molecule linked to three phosphate groups.
Nucleic acids are the fourth group of biuological macromolecules. Complete the following b
y matching each of the phrases on the right with a word or phrase from the list on the left,
writing the appropriate letter in the blank. Answers may be used only once.
Answer
A.
Phosphate group
B.
DNA & RNA
Force that holds nitrogenous base pairs together
in a double stranded nucleic acid (DNA)
Nitrogenous bases of nucleic acids
19
EVPP 110 Lecture – Exam #1 - Practice Questions
C.
Nucleotide
Two types of nucleic acids
D.
A, T, C, G, U
Nucleotide is sugar, nitrogenous base and this
E.
Hydrogen bonding
Monomer of nucleic acids
20