Just based on common evidence....I think it is because of all the fast food restaurants, we work a lot therefore we resort to eating out, fast food places have dollar menus, and we also use motorized transportation to much as well. Most of the cities are not equipped with things like bicycle lanes.
Lactic acid in lactic acid fermentation
ethanol in alcoholic fermentation
DNA is a long polymer with deoxyriboses and a phosphate backbone. Has four different nitrogenous bases: adenine, guanine, cytosine, and thymine. RNA is a polymer with a ribose and phosphate backbone. Four different nitrogenous bases: adenine, guanine, cytosine, and uracil.