​ Photosynthesis & Cellular Respiration

Reactants and Products

6H2O + 6CO2 + light energy 🡪 6O2 + C6H12O6

​Reactants

​Products

​water carbon dioxide sunlight oxygen Glucose
(chemical energy)

Stomata

• Stomata (stoma) on the surface of leaves allow for gas exchange

• CO2 enters and O2 released through stoma

• Glucose (chemical energy) is stored as starch or used by the plant

Dependent and Independent Light Step

Light Dependent Step

• Occurs in the thylakoids of chloroplasts

• Water is split using the Sun’s energy

• Uses hydrogen, from water, to generate ATP

Light Independent step

• Occurs in the stroma of Chloroplast

• Carbon, from Carbon dioxide, Plus ATP is used to make glucose

Cellular Respiration

• Occurs in ALL Organisms

• Uses Oxygen and Glucose (chemical energy)

• Most takes place in the mitochondria in eukaryotes

• Produces water, carbon dioxide, and ATP (chemical energy)

Reactants

​6O2 + C6H12O6 🡪 6H2O + 6CO2 + ATP

​ Reactants Products

Oxygen Glucose Water Carbon Chemical Energy
(chemical energy) Dioxide

Heterotroph and Autotroph

• Heterotrophs - obtain glucose from food they consume

• Autotrophs - obtain glucose from photosynthesis

Aerobic and Anaerobic Respiration

• Aerobic respiration - requires oxygen; produces more ATP

• Anaerobic – produces some ATP without oxygen