U4L5: Cell Cycle

Mitosis most directly plays a role in which part of the growth, replication, and division of a eukaryotic cell?

• The transport of nutrients within a cell.

• The metabolic processes of a cell.

• The division of a cell's nucleus.

• The death of a cell after cell division.

What happens when control is lost during the cell cycle?

• The cell will stop functioning.

• The cell will keep dividing and possibly become cancerous.

• The cell will lose its chromosomes.

• The cell will keep dividing but remain a normal, non-cancerous cell.

Metaphase is the stage of mitosis during which the chromosomes line up along the metaphase plate in preparation of separating into two cells. Several things must occur prior to this stage in order for mitosis to be successful. Which of the following is not something that occurs before metaphase?

• The nuclear envelope fragments.

• Chromosomes become tightly coiled.

• Centrosomes align on opposite sides of the cell.

• Sister chromatids separate.

During the G₁ phase, most cells go into a resting state called G₀ where they perform normal cell functions until new cells are needed. Which of the following cell types would be the most likely to remain in G₀ for the longest time?

• adult skin cells

• cells next to damaged surrounding tissues

• adult nerve cells

• embryonic stem cells