Transcript Biology_Ch._10

Biology
Ch. 10 Review
As a cell becomes larger, its
1. volume increases faster
than its surface area.
2. surface area increases
faster than its volume.
3. volume increases, but its
surface area stays the same.
4. surface area stays the same,
but its volume increases.
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As a cell grows, it
1. places more demands on
its DNA.
2. uses up food and oxygen
more quickly.
3. has more trouble moving
enough materials across
its cell membrane.
4. all of the above
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If the surface area of a cell
increases 100 times, its volume
increases about
1.
2.
3.
4.
5 times.
10 times.
100 times.
1000 times.
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The rate at which wastes are produced
by a cell depends on the cell’s
1. ratio of surface
area to
volume.
2. environment.
3. volume.
4. surface area.
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All of the following are problems that
growth causes for cells EXCEPT
1. DNA overload.
2. excess oxygen.
3. obtaining
enough food.
4. expelling
wastes.
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Compared to small cells, large
cells have more trouble
1. dividing.
2. producing daughter cells.
3. moving needed materials in
and waste products out.
4. making copies of their
DNA.
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The process by which a cell divides
into two daughter cells is called
1. cell division.
2. metaphase.
3. interphase.
4. mitosis.
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Which of the following is NOT a way that cell
division solves the problems of cell growth?
1. Cell division provides each
daughter cell with its own copy of
DNA.
2. Cell division increases the mass of
the original cell.
3. Cell division increases the surface
area of the original cell.
4. Cell division reduces the original
cell’s volume.
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If a normal cell divides, you can
assume that
1. its surface area has become
larger than its volume.
2. its volume has become larger
than its surface area.
3. it has grown to its full size.
4. it has grown too large to
meet its needs.
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If a cell’s DNA were not copied before
cell division, the cell could
1. have a DNA
overload.
2. become cancerous.
3. fail to exchange
materials.
4. divide.
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Which of the following happens when a cell
divides?
1. The cell’s volume increases.
2. It becomes more difficult
for the cell to get enough
oxygen and nutrients.
3. The cell has DNA overload.
4. Each daughter cell receives
its own copy of the parent
cell’s DNA.
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When during the cell cycle are
chromosomes visible?
1. only during interphase
2. only when they are
being replicated
3. only during cell division
4. only during the G1
phase
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Which of the following is a phase in
the cell cycle?
1.
2.
3.
4.
G1 phase
G2 phase
M phase
all of the
above
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Which pair is correct?
1. G1 phase, DNA
replication
2. G2 phase,
preparation for
mitosis
3. S phase, cell
division
4. M phase, cell
growth
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When during the cell cycle is a
cell’s DNA replicated?
1.
2.
3.
4.
G1 phase
G2 phase
S phase
M phase
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Which event occurs during
interphase?
1. The cell grows.
2. Centrioles appear.
3. Spindle fibers
begin to form.
4. Centromeres
divide.
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Which of the following is a correct statement
about the events of the cell cycle?
1. Little happens during the
G1 and G2 phases.
2. DNA replicates during
cytokinesis.
3. The M phase is usually the
longest phase.
4. Interphase consists of the
G1 , S, and G2 phases.
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Which of the following is NOT a correct
statement about the events of the cell cycle?
1. Interphase is usually the
longest phase.
2. DNA replicates during
the S phase.
3. Cell division ends with
cytokinesis.
4. The cell grows during
the G2 phase.
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Cell division is represented in the
Figure by the letter
1.
2.
3.
4.
A.
B.
C.
D.
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The cell cycle is the
1. series of events that cells go
through as they grow and
divide.
2. period of time between the
birth and the death of a cell.
3. time from prophase until
cytokinesis.
4. time it takes for one cell to
undergo mitosis.
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The structure labeled A in the
figure is called the
1. centromere.
2. centriole.
3. sister
chromatid.
4. spindle.
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The structures labeled B in th
figure are called
25% 25% 25% 25%
1. centromeres.
2. centrioles.
3. sister
chromatids.
4. spindles.
1
2
3
4
1.
2.
3.
4.
During which phase(s) of mitosis are
structures like the one shown in the
figure visible?
anaphase and
prophase
prophase and
metaphase
metaphase only
anaphase and
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interphase
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Which of the following is a
phase of mitosis?
1.
2.
3.
4.
cytokinesis
interphase
prophase
S phase
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The first phase of mitosis is
called
1. prophase.
2. anaphase.
3. metaphase.
4. interphase.
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During which phase of mitosis do the
chromosomes line up along the
middle of the dividing cell?
1.
2.
3.
4.
prophase
telophase
metaphase
anaphase
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Which of the following represents the phases
of mitosis in their proper sequence?
1. prophase, metaphase, anaphase,
telophase
2. interphase, prophase,
metaphase, anaphase, telophase
3. interphase, prophase,
metaphase, telophase
4. prophase, metaphase, anaphase,
telophase, cytokinesis
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What is the role of the spindle
during mitosis?
1. It helps separate the
chromosomes.
2. It breaks down the
nuclear membrane.
3. It duplicates the DNA.
4. It divides the cell in
half.
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The two main stages of cell division are
called
1. mitosis and
interphase.
2. synthesis and
cytokinesis.
3. the M phase and
the S phase.
4. cytokinesis and
mitosis.
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One difference between cell division
in plant cells and in animal cells is
that plant cells have
1.
2.
3.
4.
centrioles.
centromeres.
a cell plate.
chromatin.
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During normal mitotic cell division, a
parent cell having four chromosomes
will produce two daughter cells, each
containing
1.
2.
3.
4.
two chromosomes.
four chromosomes.
eight chromosomes.
sixteen chromosomes.
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What happens when cells come
into contact with other cells?
1. They divide more
quickly.
2. They stop growing.
3. They produce
cyclins.
4. They produce p53.
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Which of the following is a factor that
can stop normal cells from growing?
1.
2.
3.
4.
contact with other cells
growth factors
a cut in the skin
cyclin that has been
taken from a cell in
mitosis
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Which of the following explains why normal cells
grown in a petri dish tend to stop growing once
they have covered the bottom of the dish?
1. The cells lack cyclin.
2. The petri dish inhibits cell
growth.
3. Contact with other cells stops
cell growth.
4. Most cells grown in petri
dishes have a defective p53.
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When cytoplasm from a cell that is
undergoing mitosis is injected into a cell
that is in interphase, the second cell
1. stays in
interphase.
2. enters mitosis.
3. stops making
cyclin.
4. loses its p53.
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In eukaryotic cells, the timing
of the cell cycle is regulated by
1.
2.
3.
4.
the centrioles.
cyclins.
the spindle.
all of the
above
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Cyclins are a family of closely
related proteins that
1. regulate the
cell cycle.
2. produce p53.
3. cause cancer.
4. work to heal
wounds.
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Which of the following
regulate(s) the cell cycle?
1. growth
factors
2. cyclins
3. p53
4. all of the
above
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Which of the following is an internal
regulator of the cell cycle?
1. cyclins
2. growth factors
3. the mitotic
spindle
4. cancer cells
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Cancer is a disorder in which some
cells have lost the ability to control
their
1. size.
2. spindle
fibers.
3. growth rate.
4. surface area.
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Cancer cells form masses of
cells called
1. tumors.
2. cyclins.
3. growth
factors.
4. p53.
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A cell with a defective p53 gene
is likely to
1. divide regularly.
2. stop dividing.
3. accumulate
chromosomal
damage.
4. combat tumors.
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Cancer affects
1. humans only.
2. most unicellular
organisms.
3. multicellular
organisms.
4. unicellular
organisms.
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What is a tumor?
1. an accumulation of
cyclins
2. a mass of cancer cells
3. the rapidly dividing
cells found at the site
of a wound
4. a defective p53 gene
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As a cell’s size increases, its
ratio of surface area to volume
increases.
1. True
2. False
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As a cell’s size increases, it
places more demands on its
DNA.
1. True
2. False
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The smaller a cell is, the more
difficult it is for the cell to move
enough materials across its cell
membrane.
1. True
2. False
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Cell division solves the problem
of cell growth by increasing cell
volume.
1. True
2. False
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An imaginary cubic cell with a side
length of 10 mm would have a ratio
of surface area to volume of 6 : 10.
1. True
2. False
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Most of a cell’s growth takes
place during the
G2 phase of the cell cycle.
1. True
2. False
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A cell’s chromosomes are
replicated during interphase.
1. True
2. False
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If it takes a cell one hour to undergo
mitosis, about 50 minutes of the time
would be spent in prophase.
1. True
2. False
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The structure shown in the
figure is a replicated
chromosome.
1. True
2. False
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Typically, the longest phase
of mitosis is metaphase.
1. True
2. False
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A cell splits into two daughter
cells during telophase.
1. True
2. False
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Normal cells stop growing
when they come into contact
with other cells.
1. True
2. False
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Proteins called cyclins help
regulate the cell cycle.
1. True
2. False
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Cancer is a disorder in which
some of the body’s cells lose the
ability to control growth and
division.
1. True
2. False
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Lack of control over
mitosis is the cause of all
cancers.
1. True
2. False
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