This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: HMP Shunt Pathway, Fructose, Galactose Metabolism, Subject name: Biochemistry
NADPH is produced by - 
Select and explain. 
A. Glycolysis, B. Citric acid cycle, C. Hexose monophosphate shunt, D. Glycogenesis
C: Hexose monophosphate shunt
Answer: C: Hexose monophosphate shunt 
Explanation: Ans. is 'c' i.e., Hexose monophosphate shunt o HMP shunt is particularly important for two purposesi) Synthesis of ribose for nucleotide and nucleic acid formation.ii) Formation of NADPH which plays important role in several other biological processes, e.g. synthesis of fatty acids, cholesterol, steroid hormones and neurotransmitters.