In the diagram, the speed bumps (look like short walls) represent __________. A) The only times at which genes may be actively expressed B) Points in time when the cell divides C) One-hour timepoints D) Checkpoints in the cell cycle .

When the nuclear membrane fragments and the DNA coils into visible chromosome a) prophase b) metaphase c) anaphase d) telophase

What happens to a cell with damaged DNA?   a)  The cell is destroyed.   b)  It leaves the cell cycle to join all the other damaged cells.   c)  Nothing. Cells can’t tell the difference.   d)  A nurse cell helps to repair the cell.

What statement about Cdks/Cyclins below is false? A) Cyclins phosphorylate Cdks B) Cdks are kinases C) Cdk expression is constant during the cell cycle D) Cyclin expression fluctuates during the cell cycle E) Cdk activity fluctuates during the cell cycle