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Which gas in Earth’s atmosphere helps living things make proteins?
oxygen
nitrogen
water vapor
carbon dioxide
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Nitrogen.
Atmospheric nitrogen (N2) is used to make amino acids and other nitrogen-containing compounds needed for proteins. Microbes (and industrial processes) fix N2 into usable forms (like ammonia) that plants and animals can incorporate.
Atmospheric nitrogen (N2) is used to make amino acids and other nitrogen-containing compounds needed for proteins. Microbes (and industrial processes) fix N2 into usable forms (like ammonia) that plants and animals can incorporate.
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