Bacteria and archaea that reduce nitrate or sulfate so that they can incorporate the nitrogen or sulfur atom into an organic molecule are performing sulfur reduction. On the other hand, when nitrate or sulfate are used as terminal electron acceptors, bacteria and archaea are performing a nitrate reduction.
Anaerobic respiration is the formation of ATP without oxygen. This method still incorporates the respiratory electron transport chain, but without using oxygen as the terminal electron acceptor. Instead, molecules such as sulfate (SO42-), nitrate (NO3–), or sulfur (S) are used as electron acceptors.
With this information, we can conclude that Nitrate is a better electron acceptor than sulfate
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