6.2

Question 1

Microorganisms use polymers in organic matter as a source of glucose for respiration. Explain how microorganisms break down cellulose and lignin in plant material

Answer 1

They release digestive enzymes (polypeptides or globular proteins) which break down organic compounds into glucose monomers in hydrolysis reactions to break the glycosidic bonds

Question 2

Explain why decomposition can contribute to the greenhouse effect

Answer 2

Decomposition involves the respiration of the decomposers (glucose provided by the breakdown of biomass), releasing CO2 into the atmosphere