The Most Ancient CO₂ Fixation Pathway in Anaerobic Phototrophic Bacteria

question 40

Multiple Choice

The most ancient CO₂ fixation pathway in anaerobic phototrophic bacteria and archaea is the

• A) reverse TCA cycle.
• B) 3-hydroxypropionate cycle.
• C) Calvin cycle.
• D) reductive acetyl-CoA pathway.
• E) glyoxylate bypass.

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