The Availability of Oxygen and Other Electron Acceptors Is the Most

question 56

Multiple Choice

The availability of oxygen and other electron acceptors is the most important determinant of the types of metabolisms in a habitat. Which of the following is NOT true about anaerobic environments?

• A) They have slower rates of assimilation compared to aerobic habitats.
• B) Their rates of dissimilation are slower compared to aerobic environments.
• C) Microbes sometimes use minerals such as NOto oxidize organic compounds.
• D) Anaerobic microbial communities far exceed that of the oxygenated biosphere.
• E) Respiration of organic compounds is highly dissimilatory, reducing them to CO₂.

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