Multiple choice

Phosphoenolpyruvate (PEP) is formed during glycolysis or gluconeogenesis metabolic pathway. It is used by bacteria for which of the following?

  1. Carbon fixation

  2. Chorismate synthesis

  3. Nitrogen fixation

  4. Carbon assimilation

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A Correct answer
Explanation

PEP is used by bacteria for carbon fixation. Phosphoenolpyruvate carboxylase enzyme catalyses the addition of bicarbonate (HCO3−) to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate and inorganic phosphate.