In seawater, sulfate is the most common anion after chloride. Which of the following is correct with respect to the use of sulfate by some bacterial groups?
A) Oxidized sulfur-containing molecules have redox potentials lower than those of the nitrogen series.
B) Oxidized sulfur molecules such as sulfate and sulfite serve as electron acceptors.
C) Sulfate and sulfite can receive electrons from hydrocarbons.
D) Sulfate-reducing archaea and bacteria are widespread in the ocean.
E) All of the above.

Question

Quizplus · Accepted Answer

All of the statements are correct regarding the use of sulfate by some bacterial groups. Oxidized sulfur-containing molecules do have lower redox potentials than those of the nitrogen series, making them effective electron acceptors. Sulfate and sulfite can indeed serve as electron acceptors and receive electrons from hydrocarbons. Additionally, sulfate-reducing archaea and bacteria are widespread in marine environments, playing a crucial role in the sulfur cycle.

In Seawater, Sulfate Is the Most Common Anion After Chloride