Exploring Mitosis and the Cell Cycle

Why is mitosis important for organisms?

• It produces genetically diverse cells.

• It creates new species.

• It helps in the growth and repair of tissues.

• It reduces the chromosome number by half.

Which of the following is NOT a stage of mitosis?

• Telophase

• Metaphase

• Cytokinesis

• Prophase

During which phase of interphase is DNA replicated?

• S phase

• G1 phase

• G2 phase

• M phase

What happens during prophase?

• The nuclear membrane disintegrates and chromosomes become visible.

• Chromosomes line up at the cell's equator.

• Sister chromatids are pulled to opposite ends of the cell.

• The cell divides into two daughter cells.

What is the main event during metaphase?

• The nuclear envelope reforms.

• Chromosomes become visible.

• Chromosomes line up along the center of the cell.

• Sister chromatids are pulled apart.

During anaphase, what occurs?

• The cell prepares for division.

• Sister chromatids are pulled to opposite ends of the cell.

• The nuclear membrane disintegrates.

• Chromosomes line up at the cell's equator.

What marks the end of telophase?

• Chromosomes become visible.

• The nuclear envelope reforms and the cell divides.

• Sister chromatids are pulled apart.

• The cell enters interphase.

What is cytokinesis?

• The division of the cell's nucleus.

• The replication of DNA.

• The division of the cell's cytoplasm.

• The formation of spindle fibers.

What causes cancer in relation to the cell cycle?

• Proper cell division.

• Formation of spindle fibers.

• Damage to genes regulating the cell cycle.

• Controlled cell growth.

What are tumors?

• Cells that undergo controlled division.

• Cells that help in tissue repair.

• Abnormal cell masses that deprive normal cells of nutrients.

• Normal cell masses.