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Chapter 3 – The Cellular Level of Organization
Cell Mates
Something
Selectively
Permeable
Heads or
Tails
Cell Cycle
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Alphabet
Soup
FINAL ROUND
Topic 1: Cell Mates
$100 Question
What does the presence of many mitochondria
imply about a cell’s energy requirements?
a. It has a high demand for energy.
b. It has a low demand for energy.
c. There is a fluctuation in the energy
needs, so flexibility is required.
d. The number of mitochondria provides no
implication of energy needs.
ANSWER
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Topic 1: Cell Mates
$100 Answer
What does the presence of many mitochondria
imply about a cell’s energy requirements?
a. It has a high demand for energy.
b. It has a low demand for energy.
c. There is a fluctuation in the energy
needs, so flexibility is required.
d. The number of mitochondria provides no
implication of energy needs.
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Topic 1: Cell Mates
$200 Question
Cells lining the small intestine have numerous fingerlike
projections on their free surface that contain microvilli.
What is the function of microvilli?
a. to move substances across the cell’s surface
b. to increase the cell’s surface area and
absorptive ability
c. to decrease the cell’s surface area and control
filtration
d. to move substances across
the cell’s surface
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ANSWER
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Topic 1: Cell Mates
$200 Answer
Cells lining the small intestine have numerous fingerlike
projections on their free surface that contain microvilli.
What is the function of microvilli?
a. to move substances across the cell’s surface
b. to increase the cell’s surface area and
absorptive ability
c. to decrease the cell’s surface area and control
filtration
d. to move substances across
the cell’s surface
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Topic 1: Cell Mates
$300 Question
Certain cells in the ovaries and testes contain
large amounts of smooth endoplasmic reticulum
(SER). Why?
a. to produce large amounts of proteins
b. to digest materials quickly
c. to store large amounts of hormones
d. to produce large amounts of steroid
ANSWER
hormones
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Topic 1: Cell Mates
$300 Answer
Certain cells in the ovaries and testes contain
large amounts of smooth endoplasmic reticulum
(SER). Why?
a. to produce large amounts of proteins
b. to digest materials quickly
c. to store large amounts of hormones
d. to produce large amounts of steroid
hormones
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Topic 1: Cell Mates
$400 Question
Which of the listed organelles is nonmembranous and correctly paired with its
function?
a. microvilli / movement of materials over
cell’s surface
b. ribosomes / protein synthesis
c. mitochondria / produce ATP required by
cell
d. microtubules / increase surface
ANSWER
area for absorption
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Topic 1: Cell Mates
$400 Answer
Which of the listed organelles is nonmembranous and correctly paired with its
function?
a. microvilli / movement of materials over
cell’s surface
b. ribosomes / protein synthesis
c. mitochondria / produce ATP required by
cell
d. microtubules / increase surface
area for absorption
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Topic 1: Cell Mates
$500 Question
Which statement correctly distinguishes between
cytoplasm and cytosol?
a. Cytosol has a higher concentration of
suspended proteins than cytoplasm.
b. Cytosol is the intracellular fluid and is composed
of nutrients, ions, proteins, and wastes, and
cytoplasm is the term for all material located
between the cell membrane and nucleus.
c. Potassium ion concentration is higher in
cytoplasm than in cytosol.
d. Cytosol and cytoplasm refer to the
same substance.
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ANSWER
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Topic 1: Cell Mates
$500 Answer
Which statement correctly distinguishes between
cytoplasm and cytosol?
a. Cytosol has a higher concentration of
suspended proteins than cytoplasm.
b. Cytosol is the intracellular fluid and is composed
of nutrients, ions, proteins, and wastes, and
cytoplasm is the term for all material located
between the cell membrane and nucleus.
c. Potassium ion concentration is higher in
cytoplasm than in cytosol.
d. Cytosol and cytoplasm refer to the
same substance.
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Topic 2: Something Selectively Permeable
$100 Question
Which component of the cell membrane is
primarily responsible for the membrane’s ability
to form a physical barrier between the cell’s
internal and external environments?
a. phospholipid bilayer
b. glycocalyx
c. peripheral proteins
d. proteoglycans
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ANSWER
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Topic 2: Something Selectively Permeable
$100 Answer
Which component of the cell membrane is
primarily responsible for the membrane’s ability
to form a physical barrier between the cell’s
internal and external environments?
a. phospholipid bilayer
b. glycocalyx
c. peripheral proteins
d. proteoglycans
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Topic 2: Something Selectively Permeable
$200 Question
Which transport process involves the movement
of a substance down a concentration gradient,
without using ATP and utilizing a carrier protein?
a. facilitated diffusion
b. osmosis
c. active transport
d. endocytosis
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ANSWER
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Topic 2: Something Selectively Permeable
$200 Answer
Which transport process involves the movement
of a substance down a concentration gradient,
without using ATP and utilizing a carrier protein?
a. facilitated diffusion
b. osmosis
c. active transport
d. endocytosis
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Topic 2: Something Selectively Permeable
$300 Question
Which pair of the following methods of carriermediated transport is paired with its function?
a. active transport / it is dependent on a
concentration gradient
b. facilitated diffusion / substances are
bound to a receptor and passed across
the cell membrane by carrier proteins
c. sodium–potassium pump / moves Na+
outside the cell and K+ inside the cell
ANSWER
d. both B and C
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Topic 2: Something Selectively Permeable
$300 Answer
Which pair of the following methods of carriermediated transport is paired with its function?
a. active transport / it is dependent on a
concentration gradient
b. facilitated diffusion / substances are
bound to a receptor and passed across
the cell membrane by carrier proteins
c. sodium–potassium pump / moves Na+
outside the cell and K+ inside the cell
d. both B and C
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Topic 2: Something Selectively Permeable
$400 Question
What term below describes the cell
membrane?
a. semipermeable
b. freely permeable
c. impermeable
d. nonpermeable
ANSWER
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Topic 2: Something Selectively Permeable
$400 Answer
What term below describes the cell
membrane?
a. semipermeable
b. freely permeable
c. impermeable
d. nonpermeable
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Topic 2: Something Selectively Permeable
$500 Question
Define “selectively permeable” as it applies to the cell
membrane.
a. It is a membrane through which nothing can pass.
b. It is a membrane that allows the free passage of
some molecules but restricts the passage of
others.
c. It is a membrane through which any substance
can pass without restriction.
d. It is a membrane that only allows substances
through by active transport.
ANSWER
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Topic 2: Something Selectively Permeable
$500 Answer
Define “selectively permeable” as it applies to the cell
membrane.
a. It is a membrane through which nothing can
pass.
b. It is a membrane that allows the free passage of
some molecules but restricts the passage of
others.
c. It is a membrane through which any substance
can pass without restriction.
d. It is a membrane that only allows substances
through by active transport.
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Topic 3: Heads or Tails
$100 Question
Which type of integral protein allows water
and small ions to pass through the cell
membrane?
a. receptor proteins
b. carrier proteins
c. channel proteins
d. recognition proteins
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ANSWER
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Topic 3: Heads or Tails
$100 Answer
Which type of integral protein allows water
and small ions to pass through the cell
membrane?
a. receptor proteins
b. carrier proteins
c. channel proteins
d. recognition proteins
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Topic 3: Heads or Tails
$200 Question
If the cell membrane were freely
permeable to sodium ions (Na+), how
would the transmembrane potential be
affected?
a. It would not change.
b. It would become more positive.
c. It would become more negative.
d. It would become unstable.
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ANSWER
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Topic 3: Heads or Tails
$200 Answer
If the cell membrane were freely
permeable to sodium ions (Na+), how
would the transmembrane potential be
affected?
a. It would not change.
b. It would become more positive.
c. It would become more negative.
d. It would become unstable.
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Topic 3: Heads or Tails
$300 Question
Which of the following is NOT a function of
membrane proteins?
a. to bind specific ligands
b. to anchor or stabilize the cell
membrane
c. the production of energy for the cell
d. to regulate ion passage
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ANSWER
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Topic 3: Heads or Tails
$300 Answer
Which of the following is NOT a function of
membrane proteins?
a. to bind specific ligands
b. to anchor or stabilize the cell
membrane
c. the production of energy for the cell
d. to regulate ion passage
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Topic 3: Heads or Tails
$400 Question
Some pediatricians recommend the use of a 10% salt
solution to relieve congestion for infants with stuffy
noses. What effect would such a solution have on the
cells lining the nasal cavity, and why?
a. Cells will lose water because this is a hypertonic
solution.
b. Cells will lose water because this is a hypotonic
solution.
c. Cells will gain water because this is a hypertonic
solution.
d. Cells will gain water because this is a
hypotonic solution.
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ANSWER
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Topic 3: Heads or Tails
$400 Answer
Some pediatricians recommend the use of a 10% salt
solution to relieve congestion for infants with stuffy
noses. What effect would such a solution have on the
cells lining the nasal cavity, and why?
a. Cells will lose water because this is a hypertonic
solution.
b. Cells will lose water because this is a hypotonic
solution.
c. Cells will gain water because this is a hypertonic
solution.
d. Cells will gain water because this is a
hypotonic solution.
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Topic 3: Heads or Tails
$500 Question
How would a decrease in the concentration of oxygen in
the lungs affect the diffusion of oxygen into the blood?
a. A decrease in molecule size results in
decreased diffusion.
b. A decrease in distance results in increased
diffusion.
c. An increase in electrical forces results in
increased diffusion.
d. A decrease in gradient size results in
decreased speed of diffusion.
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ANSWER
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Topic 3: Heads or Tails
$500 Answer
How would a decrease in the concentration of oxygen in
the lungs affect the diffusion of oxygen into the blood?
a. A decrease in molecule size results in
decreased diffusion.
b. A decrease in distance results in increased
diffusion.
c. An increase in electrical forces results in
increased diffusion.
d. A decrease in gradient size results in
decreased speed of diffusion.
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Topic 4: Cell Cycle
$100 Question
A cell is actively manufacturing enough
organelles to serve two functional cells.
This cell is probably in which phase of its
cycle?
a. S
b. G1
c. G2
d. M
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ANSWER
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Topic 4: Cell Cycle
$100 Answer
A cell is actively manufacturing enough
organelles to serve two functional cells.
This cell is probably in which phase of its
cycle?
a. S
b. G1
c. G2
d. M
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Topic 4: Cell Cycle
$200 Question
During the S phase, which of the following
occur(s)?
a. DNA polymerase binds to exposed
nitrogenous bases.
b. DNA replication takes place.
c. Synthesis of histone proteins in the
nucleus occurs.
d. All of the above are correct.
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ANSWER
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Topic 4: Cell Cycle
$200 Answer
During the S phase, which of the following
occur(s)?
a. DNA polymerase binds to exposed
nitrogenous bases.
b. DNA replication takes place.
c. Synthesis of histone proteins in the
nucleus occurs.
d. All of the above are correct.
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Topic 4: Cell Cycle
$300 Question
What would happen if spindle fibers failed to
form in a cell during mitosis?
a. The centromeres would not appear.
b. The nuclear membrane would not
disintegrate.
c. The chromosomes would not separate.
d. The chromatin would not condense.
ANSWER
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Topic 4: Cell Cycle
$300 Answer
What would happen if spindle fibers failed to
form in a cell during mitosis?
a. The centromeres would not appear.
b. The nuclear membrane would not
disintegrate.
c. The chromosomes would not separate.
d. The chromatin would not condense.
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Topic 4: Cell Cycle
$400 Question
During DNA replication, a nucleotide is deleted from
a sequence that normally codes for a polypeptide.
What effect will this deletion have on the amino acid
sequence of the polypeptide?
a. No effect, deletion will be skipped.
b. No effect, deletion will be automatically
repaired.
c. Amino acid sequence will disintegrate.
d. Amino acid sequence would be altered.
ANSWER
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Topic 4: Cell Cycle
$400 Answer
During DNA replication, a nucleotide is deleted from
a sequence that normally codes for a polypeptide.
What effect will this deletion have on the amino acid
sequence of the polypeptide?
a. No effect, deletion will be skipped.
b. No effect, deletion will be automatically
repaired.
c. Amino acid sequence will disintegrate.
d. Amino acid sequence would be altered.
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Topic 4: Cell Cycle
$500 Question
Which of the following stages of mitosis is
correctly paired with the events of that stage?
a. anaphase / centromeres of chromatid pairs
separate and daughter chromosomes are pulled
to opposite ends of the cell
b. prophase / chromatids are aligned along center
of the cell
c. telophase / chromosomes condense and nuclear
membrane fragments
ANSWER
d. all of the above
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Topic 4: Cell Cycle
$500 Answer
Which of the following stages of mitosis is
correctly paired with the events of that stage?
a. anaphase / centromeres of chromatid pairs
separate and daughter chromosomes are pulled
to opposite ends of the cell
b. prophase / chromatids are aligned along center
of the cell
c. telophase / chromosomes condense and nuclear
membrane fragments
d. all of the above
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Topic 5: Alphabet Soup
$100 Question
When they encounter bacteria, certain
types of white blood cells engulf the
bacteria and bring them into the cell. What
is this process called?
a. pseudocytosis
b. exocytosis
c. pinocytosis
d. phagocytosis
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ANSWER
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Topic 5: Alphabet Soup
$100 Answer
When they encounter bacteria, certain
types of white blood cells engulf the
bacteria and bring them into the cell. What
is this process called?
a. pseudocytosis
b. exocytosis
c. pinocytosis
d. phagocytosis
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Topic 5: Alphabet Soup
$200 Question
Each type of cell has a characteristic
resting potential. Which is correct?
a. fat cells (–40 mV)
b. neurons (–70 mV)
c. cardiac muscle cells (–90 mV)
d. all of the above
ANSWER
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Topic 5: Alphabet Soup
$200 Answer
Each type of cell has a characteristic
resting potential. Which is correct?
a. fat cells (–40 mV)
b. neurons (–70 mV)
c. cardiac muscle cells (–90 mV)
d. all of the above
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Topic 5: Alphabet Soup
$300 Question
What process would be affected by the
lack of the enzyme RNA polymerase?
a. Nothing would be affected; DNA
polymerase would take over.
b. It would affect the cell’s ability to
duplicate DNA.
c. It would affect the cell’s ability to
translate DNA.
d. It would affect the cell’s ability to
transcribe DNA.
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ANSWER
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Topic 5: Alphabet Soup
$300 Answer
What process would be affected by the
lack of the enzyme RNA polymerase?
a. Nothing would be affected; DNA
polymerase would take over.
b. It would affect the cell’s ability to
duplicate DNA.
c. It would affect the cell’s ability to
translate DNA.
d. It would affect the cell’s ability to
transcribe DNA.
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Topic 5: Alphabet Soup
$400 Question
What is the genetic code in protein synthesis?
a. It is the method by which proteins code
for amino acids.
b. It is the “language” the cell uses in the
form of triplet codons, which specify
individual amino acids.
c. It is the portion of DNA that contains
instructions for the synthesis of tRNA.
d. It is the strand of DNA containing
complementary triplets used
ANSWER
for mRNA production.
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Topic 5: Alphabet Soup
$400 Answer
What is the genetic code in protein synthesis?
a. It is the method by which proteins code
for amino acids.
b. It is the “language” the cell uses in the
form of triplet codons, which specify
individual amino acids.
c. It is the portion of DNA that contains
instructions for the synthesis of tRNA.
d. It is the strand of DNA containing
complementary triplets used for
mRNA production.
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Topic 5: Alphabet Soup
$500 Question
What are two reasons that mRNA transcription is
so vital?
a. Protein synthesis occurs through transcription,
and it occurs in the nucleus to maintain
homeostasis.
b. DNA cannot leave the nucleus / transcription
ensures that mRNA exactly matches the coding
strand of the gene.
c. It allows formation of chains of amino acids / the
same information is presented in a different
language.
ANSWER
d. None of these answers are correct.
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Topic 5: Alphabet Soup
$500 Answer
What are two reasons that mRNA transcription is
so vital?
a. Protein synthesis occurs through transcription,
and it occurs in the nucleus to maintain
homeostasis.
b. DNA cannot leave the nucleus / transcription
ensures that mRNA exactly matches the coding
strand of the gene.
c. It allows formation of chains of amino acids / the
same information is presented in a different
language.
d. None of these answers are correct.
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FINAL ROUND Question
What is so special about osmosis, compared with
diffusion?
a. Osmosis allows free passage of alcohol, fatty
acids, and steroids through the plasma
membrane.
b. Osmosis is the movement of water rather than
solute.
c. In osmosis, water flows across a membrane
toward the solution that has a higher
concentration of solutes, because that is where
water concentration is lower.
ANSWER
d. B and C are correct.
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FINAL ROUND Answer
What is so special about osmosis, compared with
diffusion?
a. Osmosis allows free passage of alcohol, fatty
acids, and steroids through the plasma
membrane.
b. Osmosis is the movement of water rather than
solute.
c. In osmosis, water flows across a membrane
toward the solution that has a higher
concentration of solutes, because that is where
water concentration is lower.
d. B and C are correct.
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