Briefly fill in blank with answers **Transcription for Educational Website:**3. NADH and FADH₂ drop off high energy electrons captured from glucose at the **electron transport chain**. The energy released as electrons travel through the electron transport chain is used to power the formation of 30-32 more __________. The "spent" (low energy) electrons are then transferred to __________, the final electron acceptor. H₂O is formed as a byproduct (waste product).4. Examine the chemical equation for cellular respiration, and your answers to the above questions. Explain why monitoring CO₂ levels enables you to estimate the rate of cellular respiration.

NADH and FADH2 are two reducing equivalents produced as a result of cellular respiration. NADH and FADH2 are produced as a result of glucose oxidation to carbon dioxide in TCA cycle. These reducing equivalents are oxidized in electron transport chain resulting in the generation of energy. Once NADH and FADH2 are produced during the cellular respiration, these molecules donates electrons to the electron carriers of electron transport chain. These electron carriers are present at high reduction potential as compared to NADH and FADH2. As electrons are transferred from one electron carrier to another, a proton gradient is generated across the inner mitochondrial membrane resulting from the transfer of protons from the matrix to the intermembrane space. When these protons flow to matrix, ATP are produced by the enzyme ATP synthase. Hence, the energy that is released as electron travel through electron-transport chain is used to power the formation of 30-32 more ATP. The electrons which are low in energy are then transferred to Oxygen which acts as terminal acceptor of the Electron-transport chain. After accepting low energy electrons, these oxygen molecules are reduced to form water. Hence the fill in blank should be: 1st blank: ATP 2nd blank: Oxygen