Notes – Cell Cycle Regulation Biology 12/8 The cell cycle is closely regulated throughout the process to ensure that the new cells are healthy and function correctly, as well as to prevent excessive cell division. What happens when dividing cells come into contact with one another? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Define regulatory proteins: __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ Internal:_______________________________________________________________________________________________________ External:_______________________________________________________________________________________________________ A specific type of external regulatory protein is called _______________________________ and they function by ___________________________________________________________________________________________________ What is cyclin? ____________________________________________________ Illustrate the levels of cyclin during the cell cycle. ____________________________________________________ ____________________________________________________ ____________________________________________________ ____________________________________________________ Interphase M Interphase M Interphase M What is apoptosis? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ What is cancer? __________________________________________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________