Question

multiple choice question

which is the primary pathway used by heterotrophic microorganisms to obtain energy?

aerobic respiration
fermentation
anaerobic respiration

Explanation:

Identify the primary metabolic pathway

Aerobic respiration is the most efficient and primary pathway used by the majority of heterotrophic microorganisms to generate ATP when oxygen is available.

Compare alternative pathways

Fermentation and anaerobic respiration serve as alternative pathways when oxygen is absent, yielding significantly less energy per glucose molecule.

Answer:

• Aerobic respiration (Correct answer)
• Fermentation
• Anaerobic respiration