Essential pentosuria is due to defect in: (A) HMP pathway, (B) Glycolysis, (C) Gluconeogenesis, (D) Uronic acid pathway
Answer is D. It is an inborn error of metabolism.In the pathway, L-xylulose is conveed to D-xylulose by two enzymes, xylitol dehydrogenase, and xylulose reductase.Absence of any of these enzymes leads to pentosuria.Ref: DM Vasudevan, 7th edition, page no: 135