This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Basics of carbohydrate metabolism, Subject name: Biochemistry
[{'content': 'The number of ATPs produced by HMP shunt is \nSelect and explain. \nA. Zero, B. One, C. Two, D. Four', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The number of ATPs produced by HMP shunt is zero HMP shunt/ Pentose Phosphate pathway Neither produces nor utilizes ATPs. 2 main products of HMP shunt: NADPH - in the irreversible oxidative phase Ribose-5-phosphate - In Reversible non-oxidative phase Rate limiting enzyme - Glucose-6-phosphate dehydrogenase. Extra Edge: The pathways producing Zero ATPs are: HMP (Hexose Monophosphate Pathway) Uronic Acid Pathway Alpha Oxidation Oxidation of Very Long Chain Fatty Acids (VLCFA) RL Shunt/cycle Synthesis of Ketone Bodies', 'role': 'assistant'}]