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1. What chemicals regulate the cell cycle ? How do they work ?
:Cyclin regulates the cell, it works by it regulates the time of the cell cycle in eukaryotic cells.

2. What happens when cells do not respond to the signals that normally regulate their growth ?
:The cells then turn into a cancer cell.

3. How do cells respond to contact with other cells ?
:The cells then stop growing.

4. Why can cancer be considered a disease of the cell cycle ?
:its a disorder in the cell cycle that can spread throughout the body andit can cause death.

5. Write a hypothesis about what you think would happen if cyclin were injected into a cell that was in mitosis.
:I think the process would be really fast and even skip a couple of phases and the cell would probly end up with 24 chromosomes at the end