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
FADH2 enters at which complex in ETC ? 
Select and explain. 
A. I, B. II, C. III, D. IV
B: II
Answer: B: II 
Explanation: Ans. is 'b' i.e., II FADH, enters at complex II, therefore, generates only 1-5 molecules of ATP (1 ATP production is bypassed at complex I).