The most common electron donor among hyperthermophilic Archaea is
A) Fe⁺³.
B) H₂.
C) SO₄.
D) Sᵒ.

Question

Quizplus · Accepted Answer

Hyperthermophilic archaea are known to use hydrogen (H₂) gas as the primary electron donor for their energy metabolism. This is because H₂ is a stable molecule and its oxidation provides a large amount of energy, making it an ideal energy source for these extremophilic microorganisms. Fe⁺³, SO₄, and Sᵒ are all electron acceptors used by hyperthermophilic archaea, rather than electron donors.

The Most Common Electron Donor Among Hyperthermophilic Archaea Is