Which gas is produced as a byproduct in the Krebs cycle?

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Multiple Choice

Which gas is produced as a byproduct in the Krebs cycle?

Explanation:
During the Krebs cycle, acetyl-CoA is oxidized and two decarboxylation steps release carbon dioxide. Specifically, CO2 is released when converting isocitrate to α-ketoglutarate and again when converting α-ketoglutarate to succinyl-CoA. This makes carbon dioxide the gas produced as a byproduct. Energy carriers NADH and FADH2 are formed, while oxygen is not produced in this cycle (it’s used later in the electron transport chain), and hydrogen isn’t released as H2 gas — it’s carried as NADH and FADH2. So carbon dioxide is the byproduct gas.

During the Krebs cycle, acetyl-CoA is oxidized and two decarboxylation steps release carbon dioxide. Specifically, CO2 is released when converting isocitrate to α-ketoglutarate and again when converting α-ketoglutarate to succinyl-CoA. This makes carbon dioxide the gas produced as a byproduct. Energy carriers NADH and FADH2 are formed, while oxygen is not produced in this cycle (it’s used later in the electron transport chain), and hydrogen isn’t released as H2 gas — it’s carried as NADH and FADH2. So carbon dioxide is the byproduct gas.

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