The final electron acceptor during electron transport is produces the most ATP 2. 3. Acetyl CoA is involved in the 4. NADH and FADH2 transfer their electrons to 5. The flow of electrons leads to the build up of 6. Glycolysis occurs in the 7. Krebs cycle occurs in the 8. IF oxygen is not present, the electron transport chain will still proceed. True or False?? 9. Both lactic acid and alcoholic fermentation produce 10. Carbon dioxide is produced during_and_
The Correct Answer and Explanation is :
- The final electron acceptor during electron transport is oxygen, which produces the most ATP. Explanation: In aerobic respiration, the electron transport chain (ETC) involves a series of proteins that transfer electrons from NADH and FADH2 to molecular oxygen. Oxygen serves as the final electron acceptor. As the electrons move through the chain, protons (H+) are pumped across the inner mitochondrial membrane, creating a proton gradient. This gradient powers ATP synthase, which synthesizes ATP. Oxygen’s role in accepting electrons helps produce a large amount of ATP in the process.
- Acetyl CoA is involved in the Krebs cycle. Explanation: Acetyl CoA is produced during the breakdown of glucose (through glycolysis) or fatty acids (through beta-oxidation). Acetyl CoA enters the mitochondria and reacts with oxaloacetate to form citric acid, which then enters the Krebs cycle. The cycle produces high-energy electron carriers (NADH and FADH2) that feed into the electron transport chain.
- NADH and FADH2 transfer their electrons to the electron transport chain (ETC). Explanation: NADH and FADH2 are electron carriers produced in glycolysis, the Krebs cycle, and other metabolic processes. These molecules donate electrons to the electron transport chain in the inner mitochondrial membrane, which is essential for generating ATP in oxidative phosphorylation.
- The flow of electrons leads to the build-up of protons (H+). Explanation: As electrons are transferred through the proteins of the electron transport chain, protons are pumped into the intermembrane space of the mitochondria, creating an electrochemical gradient. This gradient drives ATP synthesis through ATP synthase.
- Glycolysis occurs in the cytoplasm. Explanation: Glycolysis is the first step in both aerobic and anaerobic respiration. It takes place in the cytoplasm of the cell, where glucose is broken down into two molecules of pyruvate, producing a small amount of ATP and NADH in the process.
- Krebs cycle occurs in the mitochondrial matrix. Explanation: The Krebs cycle takes place in the matrix of the mitochondria. During this cycle, acetyl CoA is oxidized, producing CO2, NADH, FADH2, and ATP.
- If oxygen is not present, the electron transport chain will still proceed. True or False? False. Explanation: Oxygen is essential for the electron transport chain. Without oxygen, the chain cannot accept electrons, leading to a backup of electrons and halting the entire process of oxidative phosphorylation. This is why anaerobic conditions lead to fermentation.
- Both lactic acid and alcoholic fermentation produce ATP and regenerate NAD+. Explanation: Both types of fermentation regenerate NAD+ from NADH, which is crucial for allowing glycolysis to continue producing small amounts of ATP. Lactic acid fermentation occurs in muscles under anaerobic conditions, while alcoholic fermentation occurs in yeast.
- Carbon dioxide is produced during the Krebs cycle and alcoholic fermentation. Explanation: Carbon dioxide is a byproduct of the Krebs cycle, where it is released during the decarboxylation of intermediates. It is also produced during alcoholic fermentation, where pyruvate is converted into ethanol, releasing CO2.
Now, I’ll generate a visual for you!
Here is the detailed diagram of cellular respiration, illustrating glycolysis, the Krebs cycle, and the electron transport chain. It shows the flow of electrons, the involvement of oxygen, the production of ATP, and the release of carbon dioxide. Let me know if you need further explanations or details!
