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9.1 The Cell Cycle
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- The cell cycle is a repeating sequence of growth, replication of DNA and cell division.
- The cell cycle is tightly controlled; it can stop at three different check points if conditions are not normal.
- The cell cycle which leads to an increase in cell number is opposed by apoptosis which is programmed cell death.
| - In what stage of the cell cycle do cells spend most of their time and what happens during that stage?
Answer - Mitosis and cytokinesis are part of what stage of the cell cycle?
Answer - What is apoptosis and what is its function in a multicellular organism?
Answer
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Essential Study Partner
Summaries of major points- The cell cycle
- The cell cycle clock
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9.2 Mitosis and Cytokinesis
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- Cell division consists of mitosis and cytokinesis. Mitosis is nuclear division and cytokinesis is division of the cytoplasm.
- Following mitosis each daughter nucleus has the same and the full number of chromosomes.
- Once cytokinesis has occurred following mitosis, two daughter cells are present.
| - Cells containing two copies of each chromosome are called ______________, while those with only a single copy of each chromosome are _____________.
Answer - After mitosis, the daughter cells each contain the same number of chromosomes as the parental cell. How, in general, is this accomplished?
Answer - What are the five phases of mitosis?
Answer - What is the function of spindle fibers during mitosis?
Answer - What is cytokinesis?
Answer - What are the differences in cytokinesis between animal and plant cells?
Answer
| Essential Study Partner
Summaries of major points- Eukaryotic chromosomes
- The mitotic spindle
- Mitosis in animal cells
- Mitosis in plant cells
- Cytokinesis in plant and animal cells
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9.3 The Cell Cycle and Cancer
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- Cancer cells have characteristics that can only be associated with their ability to divide uncontrollably.
- Cancer develops when mutations lead to a loss of cell cycle control.
- It is possible to avoid certain agents that contribute to the development of cancer and to take protective steps to reduce the risk of cancer.
| - What are four characteristics of cancer cells?
Answer - What is the development of cancer called?
Answer - What are telomeres and how do they contribute to carcinogenesis?
Answer
| Summaries of major points- Carcinogenesis is development of cancer
- Apoptosis is programmed cell death
- Characteristics of cancer cells
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9.4 Prokaryotic Cell Division
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- Binary fission is a type of cell division that ensures each new prokaryotic cell has a single circular chromosome.
- In prokaryotes, cell division is a form of asexual reproduction. In eukaryotes, cell division permits renewal and repair.
| - The division of prokaryotic cells is called what?
Answer - What happens to a prokaryotic cell before it divides?
Answer - What is asexual reproduction?
Answer
| Essential Study Partner
Summaries of major points- Prokaryotic cells lack a nucleus and other membranous organelles
- The prokaryotic chromosome
- Binary fission
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