Pentose Phosphate Pathway

Regarding the pentose phosphate pathway (PPP), all of the following statements are correct EXCEPT:

A 28-year-old woman of Mediterranean descent presents with acute hemolytic anemia after ingesting fava beans. Her blood smear shows bite cells and Heinz bodies. Regarding the pentose phosphate pathway in this clinical context, all of the following are true EXCEPT:

A 3-year-old boy from Kerala presents with acute hemolytic anemia, jaundice, and dark urine following consumption of fava beans. Peripheral blood smear shows bite cells and Heinz bodies. G6PD deficiency is suspected. What is the most appropriate immediate next step in management?

A 28-year-old Indian male presents to the emergency department with acute haemolytic anaemia following consumption of fava beans at a wedding feast. Laboratory investigations reveal: Hb 7.2 g/dL, reticulocyte count 8%, indirect bilirubin 4.2 mg/dL, and LDH 1200 U/L. Peripheral blood smear shows bite cells and Heinz bodies. Urine dipstick is positive for blood but RBCs are absent. Which enzyme deficiency is most likely responsible for this clinical presentation?

Which biochemical feature best distinguishes the oxidative phase of the pentose phosphate pathway from the non-oxidative phase?