This is a simple biological process not requiring oxygen. 1) this is an organism that obtains its energy from inorganic substances or from the sun. 2) the process by which cells release energy in the absence of oxygen. 3) this is a compound made up of carbon, hydrogen, and oxygen atoms; it is used by cells to store and release energy. sugars are made by chloroplasts through photosynthesis and consumed by mitochondria through cell respiration. 4) this is a green pigment in chloroplasts that traps light energy from the sun. 5) this is a biological process that requires oxygen. 6) this substance is made from glucose through glycolysis, and supplies energy to living cells through the krebs cycle when oxygen is present (aerobic respiration), and alternatively ferments to produce lactate when oxygen is lacking (fermentation).