Aerobic

Definition

Aerobic refers to processes or organisms that require oxygen to survive and grow. In prokaryotes, aerobic respiration is a key metabolic pathway for energy production.

5 Must Know Facts For Your Next Test

1. Aerobic respiration in prokaryotes involves the electron transport chain and produces more ATP compared to anaerobic processes.
2. Most aerobic bacteria use oxygen as the final electron acceptor in their respiratory chain.
3. Some archaea are also capable of aerobic metabolism, utilizing unique enzymes adapted to extreme environments.
4. Aerobic conditions can influence the growth rate and ecological niche of bacteria and archaea.
5. Obligate aerobes cannot survive without oxygen, whereas facultative aerobes can switch between aerobic and anaerobic metabolism.

Review Questions

• What role does oxygen play in aerobic respiration in prokaryotes?
• How do obligate aerobes differ from facultative aerobes?
• Why is aerobic respiration more efficient in terms of ATP production compared to anaerobic pathways?

Related terms

Anaerobic: Processes or organisms that do not require oxygen for survival and may even die in its presence.

Facultative Anaerobe: Organisms that can switch between aerobic and anaerobic metabolism depending on oxygen availability.

Obligate Aerobe: Organisms that require oxygen for survival and cannot undergo anaerobic metabolism.