Exemplar Problems

Question:

Explain the significance of NADH and FADH2 in cellular respiration, including their roles in ATP production and electron transport.

Answer:

NADH and FADH2 are electron carriers that play a crucial role in cellular respiration. They carry high-energy electrons to the electron transport chain (ETC), where electrons are passed through a series of protein complexes. This process generates a proton gradient across the inner mitochondrial membrane, driving ATP synthesis via ATP synthase. NADH and FADH2 donate their electrons to the ETC, ultimately leading to the production of ATP. NADH is typically generated during glycolysis and the Krebs cycle, while FADH2 is primarily produced in the Krebs cycle.