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Suppose you are a director of a ballet theater. After reading a book about the cell cycle, you are intrigued by the similarity between your night show and the cell cycle. Each night the theater fills, the lights go out, the curtain rises, the dancers perform, the curtain falls, the lights go on, and the spectators leave, just like the cell cycle consisting of a defined sequence of events. So you decided to improve theater operation by incorporating checkpoint mechanisms similar to the cell cycle control system. First, you designed a system that raises the curtains automatically when all the seats are filled. In each seat, sensors were installed to detect a seated person. But you have not decided how to connect the sensors to the curtains.
a) You can set the sensors to send out a positive signal that adds up to be enough to raise the curtain or set each sensor to send out a negative signal that will stop the curtain from going up until every seat is filled. Which system do you think a cell would use for cell cycle control?
b) Compare advantages and disadvantages of the two modes and explain your answer. (Your shows are so popular that all the seats are filled in each show. You don't have to worry about a block in the system due to empty seats.)
At 1.4 mg/ml pure tubulin, the plus (+) ends of microtubules grow at a rate of about 2 µm/min. At this growth rate how many?-tubulin dimers (8 nm in length) are added to the ends of a microtubule each second?
What is the possibility that differences this great between observed and expected values would happen by chance. Two genes organize in corn snakes as follows: O-B is brown snakes, O-bb are orange, oo bb are albino. An orange snake was mated to a blac..
What veins are most likely involved? What pathologic changes have happened in these veins, and what is the most probable cause in this patient's case.
Social media strategy implementation and evaluation
Assume you treated butter with a fatty acid desaturase, an enzyme that removes hydrogen from fatty acids and creates double bonds.
Assume you are a clinician in a small hospital and are monitoring the progression of myclonic epilepsy in twin boys. One twin remains only mildly affected by the condition.
Determine which of the following is most likely to be the population in a psychological research study and Which of the following is NOT an empirical question?
A microbiologist must culture a patient 's feces for in testinal (enteric) pathogens. Which of the following meida would he likely use. What is the purpose of resazurin in reducing media.
Describe how each functions, and outline how the organs work together to carry out the role of an organ system. What quantity of the purple flowered, short stem plants in the F2 are expected to be pure breeding. Illustrate the work.
T.J. and Tyler were building a tree-house. While searching for a board in a pile of used lumber, T.J. stepped on a rusty nail that penetrated deep into his foot, causing it to bleed.
Determine what would be the probable outcome if mRNA molecules coding for human red blood cell antigen A were inserted into two solutions.
Susie needs a blood transfusion. She has type O blood. Her brother has type A blood. She asks if she can use his blood. What is the doctor's response?
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