BIO EOC - Mitosis & Meiosis (Pages 8-9)

At what point in the cell cycle does DNA replication occur and why?

• before a cell divides, to provide each of the two resulting cells with a complete set of DNA instructions
• before a cell divides, to ensure that the DNA will fit into the resulting cells
• during cell division, to ensure that the DNA will fit into the resulting cells
• after a cell divides, to provide each of the two resulting cells with a complete set of DNA instructions 

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Oncogenes are mutated forms of genes. Oncogenes can transform a cell into a tumor cell. Some tumor cells are benign, while others are malignant. How does the presence of an oncogene lead to the formation of a tumor?

• ATP production is inhibited.

• Cell division is unregulated.

• Somatic cell growth is inhibited.

• Antibody activity is unregulated.

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When cells leave the cell cycle, they exit during G₁ phase and then enter G₀ phase, a resting period. Most normal cells leave G₀ phase and reenter the cell cycle at G₁ phase before entering S phase. Cancer cells are different because that cannot enter G₀ phase and are likely to do which of the following?

• Fail to complete S phase

• Mutate during G₁ phase

• Repeat the cell cycle continuously

• Die after completing mitosis

Which of the following describes cancer?

• Nondisjunction of gamete cells
• Cell division without replication of DNA
• Mitosis without cytokinesis
• Uncontrolled cell division

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In mitosis, the two resulting cells are

• different from the starting cell and identical to each other.
• different from the starting cell and different from each other.
• identical to the starting cell and different from each other.
• identical to the starting cell and identical to each other.

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If there are 20 chromosomes in the nucleus before mitosis how many will there be in each new daughter cell after cytokinesis?

• 20

• 10

• 40

• 200

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Put the stages of mitosis in the correct order.

• prophase - metaphase - anaphase - telophase
• metaphase - anaphase - prophase - telophase
• anaphase - prophase - telophase - metaphase
• telophase - metaphase - prophase - anaphase

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What is Apoptosis?

• A tumor

• A protein

• Programmed cell death

• Cell cycle checkpoints

What phase of mitosis is occuring in the picture?

• Prophase
• Metaphase
• Cytokinesis
• Telophase

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What phase of mitosis is occurring in the picture?

• Prophase
• Metaphase
• Cytokinesis
• Telophase

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