Comparing respiration and photosynthesis The processes of respiration and photosynthesis are almost the reverse of one another: • The reactants for respiration (glucose and oxygen) are the products of photosynthesis. • The products of respiration (water and carbon dioxide) are the reactants for photosynthesis.
Sunlight
Photosynthesis Glucose and oxygen
Respiration Carbon dioxide and water :Fig. 11.9 Respiration and photosynthesis
The following table summarises the chemical and biological characteristics of respiration and photosynthesis:
Respiration Photosynthesis Chemical Biological ?
Process - series of steps Reactants used Products made Transforms energy
Occurs in cells Enzymes play a role
TEST TUBE
12. Explain the following statement: ‘The processes of respiration and photosynthesis are almost the reverse of one another.’
13. Explain how respiration and photosynthesis can be described as: a. chemical processes b. biological processes