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Biology Unit 5 Exam
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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
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All of the following are problems that growth causes EXCEPT
DNA overload Excess O2 Obtaining enough food Expelling wastes
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When during the cell cycle are chromosomes visible?
Only during Interphase Only when they are replicated Only during M phase (mitosis) Only during G1 phase
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Which pair is correct? G1 phase, DNA replication
G2 phase, preparation for mitosis S phase, cell division M phase (mitosis), cell growth
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When during the cell cycle is a cells DNA replicated?
M
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Which event occurs during Interphase?
Cell growth Centrioles appear Spindle fibers appear Centromeres divide
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During which phase do the chromosomes line up along the middle?
Prophase Telophase Metaphase anaphase
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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
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What is the role of the spindle during Mitosis?
Helps separate chromosomes Breaks down nuclear envelope Duplicates DNA Divides cell in half
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The two main stages of cell division
Mitosis, interphase Synthesis, cytokinesis M phase, S phase Mitosis, Cytokinesis
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Which will stop cells from growing
Contact with other cells Growth factors Cut in the skin Cyclin taken from a cell in mitosis
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Why would cells in a petri dish stop growing once they have covered the bottom
Cells lack cyclin The petri dish inhibits cell growth Contact with other cells inhibits growth Most cells in petri dishes lack p53
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Cancer is a disorder in which some cells have lost their ability to control their
Size Spindle fibers Growth rate Surface area
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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
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Compared with small cells, large cells have more trouble
Dividing Producing daughter cells Moving materials in and out Making copies of DNA
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The process in which a cell divides into two daughter cells
Cell division Metaphase Interphase mitosis
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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
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Which is a phase in the cell cycle
G1 G2 M All of the above
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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
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What is the point in the middle of a chromosome called?
Centromere Centriole Sister chromatid spindle
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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
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