Cellular Respiration Questions and Answers Latest Version Already Passed

Cellular Respiration Questions and Answers Latest Version Already Passed Where does cellular respiration take place in eukaryotic cells? Cellular respiration takes place primarily in the mitochondria of eukaryotic cells. What are the three main stages of cellular respiration? The three main stages of cellular respiration are glycolysis, the citric acid cycle, and the electron transport chain. What is the starting molecule for glycolysis? The starting molecule for glycolysis is glucose. What is the final product of glycolysis? The final products of glycolysis are two molecules of pyruvate, two ATP molecules, and two NADH molecules. What is the role of NADH in cellular respiration? 2 NADH carries high-energy electrons from glycolysis and the citric acid cycle to the electron transport chain, where they help generate ATP. Where does the citric acid cycle occur in the cell? The citric acid cycle occurs in the mitochondrial matrix. What is produced during the citric acid cycle? The citric acid cycle produces ATP, NADH, FADH2, and carbon dioxide. What molecule enters the citric acid cycle after being formed from pyruvate? Acetyl-CoA enters the citric acid cycle after being formed from pyruvate. What is the role of oxygen in cellular respiration? Oxygen serves as the final electron acceptor in the electron transport chain, allowing the process to continue and produce ATP. What happens in the electron transport chain? 3 In the electron transport chain, electrons are transferred through protein complexes, creating a proton gradient that drives ATP production. How is ATP produced in the electron transport chain? ATP is produced in the electron transport chain through a process called oxidative phosphorylation, where a proton gradient powers ATP synthase to generate ATP. What is chemiosmosis? Chemiosmosis is the movement of protons across the mitochondrial membrane, which drives the synthesis of ATP via ATP synthase. How many ATP molecules are produced from one molecule of glucose in aerobic respiration? One molecule of glucose can produce up to 38 ATP molecules through aerobic respiration. What is the difference between aerobic and anaerobic respiration? Aerobic respiration requires oxygen and produces more ATP, while anaerobic respiration occurs without oxygen and produces much less ATP. What happens when oxygen is not available for cellular respiration? 4 When oxygen is not available, cells switch to anaerobic respiration or fermentation to produce ATP, though less efficiently.