Question

Suppose you are a director of a ballet theater. After reading abook about the cell cycle, you are intrigued by the similaritybetween your night show and the cell cycle. Each night the theaterfills, the lights go out, the curtain rises, the dancers perform,the curtain falls, the lights go on, and the spectators leave, justlike the cell cycle consisting of a defined sequence of events. Soyou decided to improve theater operation by incorporatingcheckpoint mechanisms similar to the cell cycle control system.First, you designed a system that raises the curtains automaticallywhen all the seats are filled. In each seat, sensors were installedto detect a seated person. But you have not decided how to connectthe sensors to the curtains.

a) You can set the sensors to send out a positive signal that addsup to be enough to raise the curtain or set each sensor to send outa negative signal that will stop the curtain from going up untilevery seat is filled. Which system do you think a cell would usefor cell cycle control? (1 point)

b) Compare advantages and disadvantages of the two modes andexplain your answer. (Your shows are so popular that all the seatsare filled in each show. You don