Introduction: "Fermentation occurs in fruits, bacteria, yeasts, fungi, as well as in the muscles of mammals" (Biology Online, 2008, p. xx-xx). “Yeasts were found to have a connection with fermentation, as noted by the French chemist Louis Pasteur” (Biology Online, 2008, p. xx-xx). “Pasteur originally defined fermentation as breathing without air” (Biology Online, 2008, p. xx-xx). “However, fermentation does not always have to occur under anaerobic conditions” (Biology Online, 2008, p. xx-xx). “Yeasts still prefer to undergo fermentation to process organic compounds and generate ATP even in the presence of oxygen” (Biology Online, 2008, p. xx-xx). “However, in mammalian muscles, they switch from oxidative phosphorylation (of cellular respiration) to fermentation when oxygen supply becomes limited, especially during strenuous activity such as strenuous exercise” (Biology Online, 2008, p. xx-xx ). one of the processes of glycolysis, it is anaerobic, essentially meaning that it does not use air. Its end product is ethanol, which is a form of alcohol, ethanol differs from alcohol in its chemical composition. The end product of ethanol from glycolysis can be explained by the following equation. “C2 H12 O6 → 2CO2 +2C2 H5 OH+2ATP” (Slide Share, n.d., p. xx-xx). The reactant is glucose and the finished product is ethanol. “Photosynthesis (literally “synthesis from light”) is a metabolic process by which energy from sunlight is captured and used to convert carbon dioxide (CO2) and water (H2O) into carbohydrates (which is represented as a six-carbon sugar, C6H12O6) and oxygen gas (O2)” (BioPortal, n.d., p. 190). Photosynthesis in simplest terms is the ability of a living plant to carry out its chemical process through the use of light energy. Photosynthesis cannot occur in the absolute absence of light, but it stores the light it captures during the day and uses it when necessary. Photosynthesis can occur in land plants and aquarium plants such as algae. There are many factors that influence a plant's ability to perform photosynthesis, such as light, the color of light, and the amount of water and/or light. This laboratory has two sections. The first section deals with fermentation. The purpose of the fermentation laboratory is to alter 5 different independent variables (temperature, acid pH, alkaline pH, enzyme concentration and substrate concentration), to know their effects on the ongoing fermentation process. The second part of this lab deals with photosynthesis. This laboratory has several experiments. In the first experiment, students will learn the effects that different colored test tubes have on photosynthesis in elodea twigs.