Historically, Betelgeuse, a red supergiant in the constellat…
Historically, Betelgeuse, a red supergiant in the constellation of Orion, has been one of the brightest stars in the night sky. However, between September 2019 and February 2020, the star apparent magnitude changed dramatically. (A) Use the graph of the magnitude of Betelgeuse provided below (Nature 2020) and calculate the change in brightness of the star.
Read DetailsThe lac operon in E. coli codes for genes that are involved…
The lac operon in E. coli codes for genes that are involved in breaking lactose into glucose and galactose when the cell needs to use those for energy. Expression of the lac operon is lowest when glucose levels are [a] and lactose levels are [b]. Hint: think this through logically if you don’t remember how the lac operon works.
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