The aim of this lecture is to present on how Aerobic and Anaerobic Respiration occurs. By this lecture you can learn how the type of sugar affects the rate of respiration; how the concentration of sugar affects the amount of energy produced; and determine the rate of respiration while using yeast to breakdown different sugars. Anaerobic Respiration refers to the oxidation of molecules in the absence of oxygen to produce energy. Aerobic respiration needs oxygen to work. Most of the chemical reactions involved in the process happen in tiny objects inside the cell cytoplasm, called mitochondria.