The substances that donate electrons to the electron transport chains of chemolithotrophs are ___________.

Question

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Chemolithotrophs are organisms that derive energy from inorganic compounds. These compounds, such as hydrogen gas, sulfur compounds, and iron, donate electrons to the electron transport chain, which generates ATP through oxidative phosphorylation. Carbohydrates, lipids, methane gas, and alcohols are organic compounds that can serve as energy sources for some organisms, but not for chemolithotrophs.

The Substances That Donate Electrons to the Electron Transport Chains