The Cell in Action Cell Energy

All cells need energy to carry out cell functions. Cell Energy All cells need energy to carry out cell functions. Cells obtain and process energy in different ways. Most energy comes from the sun.

Photosynthesis What: food (sugar) making process Who: plants, algae, and some bacteria When: presence of sunlight Where: chloroplast (chlorophyll) How: 6CO2 + 6H2O + light energy C6H12O6 + 6O2 Carbon Water Glucose Oxygen Dioxide

Cellular Respiration What: release energy (ATP) from food Who: animals, plants, algae, and some bacteria When: presence of oxygen Where: mitochondrion How: C6H12O6 + 6O2 6CO2 + 6H2O + energy (ATP) Glucose Oxygen Carbon Water Dioxide

Fermentation What: release energy (ATP) from food Who: animals, fungi and bacteria When: absence of oxygen Where: mitochondrion How: C6H12O6 2CO2 + 2C3H6O3 + energy (ATP) Glucose Carbon *Lactic Acid Dioxide * Lactic Acid = muscle fatigue & burning sensation