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Discussion

DAHP synthetase catalyzes the condensation of

  • A.erythrose-4-phosphate
  • B.phosphoenol pyruvate
  • C.both (a) and (b)
  • D.phenylalanine

Answer: C

Correct answer: both (a) and (b)

DAHP synthetase catalyses the first step of the shikimate pathway, condensing erythrose-4-phosphate from the pentose phosphate pathway with phosphoenolpyruvate from glycolysis. The product, DAHP, leads on to chorismate and thence to the aromatic amino acids - phenylalanine among them, which is a product of the pathway rather than a substrate of this step.

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