Biology 1002B Lecture Notes - Chronobiology, The Transcript, Cyanobacteria
15 Apr 2013
School
Department
Course
Professor
Document Summary
It acts like a sine function, goes up and down. Know when sun goes up and down. There"s no transcript during the night, only appears during the day. This is not a response to light, because it begins to synthesis when it is still dark. It anticipate that light is going to come on. The transcript abundance start when it is still dark. Question: what is the advantage of anticipation (check online) Circadian rhythms: circadian rhythm biological rhythm with a period of around a day (24 hours) sometimes more sometimes less, based on internal clock, two major criteria. Can be set by the external time (environment) Can be set of what is going on outside, can be based on the sun. So when environment is constant, the cycle continues, it runs by itself. Eventually, the free-running clock can get out of whack, must be trained again. E. g. body temperature and hormone under circadian control, even under constant environment.
