This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
How many net ATPs are generated per glucose molecule upon undergoing TCA cycle? 
Select and explain. 
A. 10 ATPs`, B. 20 ATPs, C. 7 ATPs, D. 2 ATPs
B: 20 ATPs
Answer: B: 20 ATPs 
Explanation: 10 ATPs are generated per 1 pyruvate molecule. 1 Glucose yields 2 pyruvate molecules.