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Chromosomes are the structure in which DNA is
packaged.
Centromere is the region where sister chromatid are
bound together.
Gene is a segment of DNA that codes for RNA and
protein.
Chromatin is a substance made up of DNA and
protein.
Nucleosome is a structural unit made of DNA wound
around a core of histone proteins.
Chromatid is a thick strand made up of condensed
DNA.
Histone is a type of protein found in the chromosomes
of eukaryotic cells.
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Interphase is a major portion of a cell’s life.
Cell cycle is a repeating sequence of cellular
growth and division.
Cytokinesis is the process by which cytoplasm
is divided between daughter cells.
Centrosome is an organelle that helps assemble
the spindle and aids chromatid movement in a
dividing cell.
Spindle is a microtuble network that pulls
chromatids in a dividing cell.
Mitosis is the process by which the nucleus of a
cell becomes two nuclei.
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Why do multicellular organisms produce new
cells?
To advance growth of an organism, replace old cells or
cells not working well, and heal a tear or wound.
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In prokaryotic cells, DNA appears in the form of a
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In eukaryotic cells, DNA is wrapped around
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Proteins
What do all cells do to prepare for cell division?
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loop
Make an extra copy of their complete DNA
What pinches a dividing prokaryotic cell into two
cells?
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The cell wall
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Mitosis occurs
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Which of these events does NOT occur during
interphase?
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The cytoplasm is divided
During which stage of mitosis do nuclear
envelopes form?
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After the second gap phase of interpase.
Telophase
What is the first stage of mitosis?
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Prophase
 What
is the protein that
aids in the packing of
DNA called?
 Histone
 Starting
at the first phase,
name the three phases of
Interphase and what occurs
at each phase.
 G1
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The size of the cell increases
S
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Synthesis
The cell’s DNA replicates
 G2
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Gap one phase
Gap two phase
The cell checks to make sure DNA is copied correctly
and environmental conditions are A-OK for cell
reproduction. If the cell’s DNA needs a touch up,
what structure is responsible for this duty?
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Put the above terms in proper
sequence and identify where each is
found in
Interphase
 Mitosis
 Cytokinesis
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Interphase has chromatin only.
Cytokinesis has chromatin only.
In prophase, the chromatin condenses to form
chromatid and when joined with a centromere,
form chromosomes.
In metaphase, there are chromosomes.
In anaphase, there are chromosomes.
In telophase, as the cell separates, the
chromosomes turn back into chromatin.
 What
is the difference
between a tumor and
cancer?
 Tumors
are masses of
rapidly dividing, abnormal
cells.
 Cancer is a group of
diseases involving
uncontrolled cell growth.
 What
is
meant by a
cell cycle?
A
cell cycle is a continuous
repeating sequence of cell
growth and cell division.
 Before
cell division, what
do both prokaryotic and
eukaryotic cells need to do?
 Copy
their DNA
 What
are two structures
within the cell that are
involved in the movement
of chromosomes during
cell division?
The spindle pulls the
chromosome apart at the
centromere during what
phase???????
 What
are feedback signals
and what are they used
for?
 Feedback
signals are
signals to the cell that can
be influenced by
environmental or nutrient
factors that can either start
or delay the cell cycle.
 In
which phase does the
nuclear membrane and
nucleolus start to
disappear?
 In
prophase—also this is
where you can first see
what??????
 Starting
with G1 in
Interphase, list the other
phases in the cell cycle in
order.
 G1
S
 G2
 Mitosis
 Cytokinesis
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