Chapter 11-12 Review Questions

1. Name five animal hormones involved in long distance signaling in cells?

2. Name three plant hormones involved in long distance signaling in cells??

3. How do plant hormones travel between secreting cells and target cells?

4. Explain why G-protein regulated pathways shut down rapidly in the absence of a signal?

5. Draw a diagram of the G-protein regulated transduction pathway using cAMP as the second messenger?

6. How is calcium involved in cell signaling?

7. What is the function of the second messenger IP3?

8. Look up the number of somatic cell chromosomes in humans, horses, and dogs. What are they?

9. What is the difference between a chromatid and a chromosome?

10. How are the three sub phases of interphase alike?

11. What key event occurs during S phase?

12. Describe how the cell cycle is regulated.

13. What is MPF, Cdk and cyclin and what are their roles in the cell cycle?

14. What is the difference between a benign and a malignant tumor?