Transcript As a Cell Becomes Larger, its

Biology
Unit 5 Exam
As a Cell Becomes Larger, its
• Volume increases faster than its surface area
• Surface area increases faster than its volume
• Volume increases, but its surface area stays
the same
• Surface area stays the same, but its volume
increases
All of the following are problems that
growth causes EXCEPT
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DNA overload
Excess O2
Obtaining enough food
Expelling wastes
When during the cell cycle are
chromosomes visible?
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Only during Interphase
Only when they are replicated
Only during M phase (mitosis)
Only during G1 phase
Which pair is correct?
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G1 phase, DNA replication
G2 phase, preparation for mitosis
S phase, cell division
M phase (mitosis), cell growth
When during the cell cycle is a cells
DNA replicated?
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G1
G2
S
M
Which event occurs during Interphase?
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Cell growth
Centrioles appear
Spindle fibers appear
Centromeres divide
During which phase do the
chromosomes line up along the
middle?
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Prophase
Telophase
Metaphase
anaphase
Which represents the right order of
Mitosis?
• Prophase, metaphase, anaphase, telophase
• Interphase, prophase, metaphase, anaphase,
telophase
• Interphase, prophase, metaphase, teolphase
• Prophase, metaphase, anaphase, telophase,
cytokinesis
What is the role of the spindle during
Mitosis?
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Helps separate chromosomes
Breaks down nuclear envelope
Duplicates DNA
Divides cell in half
The two main stages of cell division
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Mitosis, interphase
Synthesis, cytokinesis
M phase, S phase
Mitosis, Cytokinesis
Which will stop cells from growing
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Contact with other cells
Growth factors
Cut in the skin
Cyclin taken from a cell in mitosis
Why would cells in a petri dish stop
growing once they have covered the
bottom
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Cells lack cyclin
The petri dish inhibits cell growth
Contact with other cells inhibits growth
Most cells in petri dishes lack p53
Cancer is a disorder in which some
cells have lost their ability to control
their
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Size
Spindle fibers
Growth rate
Surface area
As a cell grows, it
• Places more demands on DNA
• Uses food and O2 more quickly
• Has more trouble moving materials across cell
membranes
• All of the above
Compared with small cells, large cells
have more trouble
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Dividing
Producing daughter cells
Moving materials in and out
Making copies of DNA
The process in which a cell divides into
two daughter cells
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Cell division
Metaphase
Interphase
mitosis
Which of the following happens when
a cell divides
• Cells volume increases
• Becomes more difficult for food and materials
to get in
• The cell has DNA overload
• Each daughter cell receives its own copy of the
parent cells DNA
Which is a phase in the cell cycle
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G1
G2
M
All of the above
The cell cycle is
• Series of events that cells go through as they
grow and divide
• Period of time between the birth and death of
a cell
• Time from prophase to cytokinesis
• Time it takes for one cell to undergo
cytokinesis
What is the point in the middle of a
chromosome called?
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Centromere
Centriole
Sister chromatid
spindle
What is a tumor
• An accumulation of cyclin
• A mass of cells
• The rapidly dividing cells found at the site of a
wound
• A defective p53 gene