Oxygen is not required for metabolism in which type of organism?

• A. Obligate aerobes
• B. Obligate anaerobes
• C. Facultative organisms

Answer: (B)

Verified step by step guidance

1. Understand the definitions of the terms: Obligate aerobes, Obligate anaerobes, and Facultative organisms.
2. Obligate aerobes require oxygen for metabolism and cannot survive without it.
3. Obligate anaerobes do not require oxygen for metabolism and may even be harmed by its presence.
4. Facultative organisms can switch between aerobic and anaerobic metabolism depending on the availability of oxygen.
5. Identify that obligate anaerobes are the organisms that do not require oxygen for metabolism, as they rely on anaerobic processes.