Adenosine triphosphate (ATP) is used to produce energy for cellular activities. The molecule is utilized for energy in cells by removing a phosphate group (dephosphorylation). This produces the molecule ADP (adenosine diphosphate), which is subsequently phosphorylated to produce ATP. This video summarizes the ATP cycle in cells and introduces the key terms. Groovy music by Ben Hammer.
Carbon dioxide production is used to infer population growth in a colony of baker's yeast. We can monitor the population as it moves through the four phases of growth, ending with carrying capacity, in which the available nutrients are inadequate to support further expansion of the population.
