Cell Cyle

25 July 2022
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21 test answers

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question
What term means cell division?
answer
Mitosis
question
Why is cell division important for both unicellular and multicellular organisms?
answer
Multicellular organisms need cell division to grow and to replace dead or damaged cells and unicellular cell division is the only way single-celled organisms can reproduce.
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Why does cell division remain important to an adult organism even after it is fully developed?
answer
It is important because we need cells to be able to repair or bodys and reproduce destroyed cells.
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What is apoptosis?
answer
is a form of programmed cell death that occurs in multicellular organisms.
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Cells divide, differentiate, or die. What is differentiation?
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It means the same as cells died.
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What are cell cycle regulators?
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Molecular signals that or halt cell division.
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What happens if cell cycle regulators don't function properly?
answer
You end up with not enough or too many cells it can cause hair loss, warts, or tumors.
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What is the G0 phase of the cell cycle?
answer
A period in the cell cycle in which cells exist in a quiescent state. GO phase is viewed as either an extended G1 phase.
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Which factors determine whether a cell enters G0?
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It depends on the organisms stage in development.
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Can cells leave G0?
answer
Yes, but only certain cells are able to leave.
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Why is cell division important?
answer
for repairing damaged or dead cells
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Why is cell division important to an adult organism?
answer
Its where cells are continuous renewed.
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What is the difference between when Cells Divide, Differentiate, or Die?
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The Response to specific molecular signals.
question
Cells go through periods of growth and division. What phase does cell division occur?
answer
Mitosis
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What is the G0 phase of the cell cycle?
answer
Its the exit of the cell cycle.
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What factors determine whether a cell enters G0?
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Depends on the organisms stage in development.
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Can cells leave G0?
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Yes
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What are cell cycle regulators?
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The progression from one phrase of the cell cycle to the next.
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Cancer is the result of an improperly regulated cell cycle. Describe two reasons why cells can form tumors.
answer
Too much cell division, and too little cell death
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Normally, proto-oncogenes stimulate the cell cycle. What are oncogenes and how do they affect the cell cycle?
answer
A gene that in certain circumstances can transform a cell into a tumor cell.
question
To cause cancer, tumor suppressor genes require _____ allele?
answer
DNA