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9.1 The Cell Cycle
  • 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.
  1. In what stage of the cell cycle do cells spend most of their time and what happens during that stage?
  2. Mitosis and cytokinesis are part of what stage of the cell cycle?
  3. What is apoptosis and what is its function in a multicellular organism?
Essential Study Partner Summaries of major points
  1. The cell cycle
  2. The cell cycle clock
Art Quizzes
9.2 Mitosis and Cytokinesis
  • 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.
  1. Cells containing two copies of each chromosome are called ______________, while those with only a single copy of each chromosome are _____________.
  2. After mitosis, the daughter cells each contain the same number of chromosomes as the parental cell. How, in general, is this accomplished?
  3. What are the five phases of mitosis?
  4. What is the function of spindle fibers during mitosis?
  5. What is cytokinesis?
  6. What are the differences in cytokinesis between animal and plant cells?
Essential Study Partner Summaries of major points
  1. Eukaryotic chromosomes
  2. The mitotic spindle
  3. Mitosis in animal cells
  4. Mitosis in plant cells
  5. Cytokinesis in plant and animal cells
Labeling Exercises Animations
(To play the animation, lengthen the pop-up window until the control bar appears.) Animation Quizzes Study Guides Lab Exercises
9.3 The Cell Cycle and Cancer
  • 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.
  1. What are four characteristics of cancer cells?
  2. What is the development of cancer called?
  3. What are telomeres and how do they contribute to carcinogenesis?
Summaries of major points
  1. Carcinogenesis is development of cancer
  2. Apoptosis is programmed cell death
  3. Characteristics of cancer cells
Art Quizzes
9.4 Prokaryotic Cell Division
  • 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.
  1. The division of prokaryotic cells is called what?
  2. What happens to a prokaryotic cell before it divides?
  3. What is asexual reproduction?
Essential Study Partner Summaries of major points
  1. Prokaryotic cells lack a nucleus and other membranous organelles
  2. The prokaryotic chromosome
  3. Binary fission

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