Which Is Evidence for Gluconeogenesis Being a More Ancient Metabolic

question 13

Multiple Choice

Which is evidence for gluconeogenesis being a more ancient metabolic pathway than glycolysis?

• A)The protein sequences for the gluconeogenesis enzymes are less conserved than those for glycolysis,indicating greater diversity developed by evolution.
• B)Many archaebacterial enzymes for gluconeogenesis have the same catalytic triad as those in modern mammals.
• C)Glycolysis in bacteria generally has fewer pathway steps,indicating that it has had less time to evolve.
• D)Some bacterial species that diverged very early in prokaryotic evolution have gluconeogenesis,but not glycolysis.

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