The Process of Cellular Respiration Questions and Answers Rated A+

The Process of Cellular Respiration Questions and Answers Rated A+ Where does glycolysis occur in the cell? Glycolysis occurs in the cytoplasm of the cell. What is the main purpose of glycolysis in cellular respiration? The main purpose of glycolysis is to break down glucose into pyruvate and produce a small amount of ATP and NADH. What happens to pyruvate after glycolysis if oxygen is present? If oxygen is present, pyruvate enters the mitochondria, where it is converted into acetyl-CoA and enters the citric acid cycle. How does ATP production during glycolysis compare to other stages of cellular respiration? ATP production during glycolysis is relatively small compared to the citric acid cycle and electron transport chain, which generate much more ATP. What is the role of NADH produced during glycolysis? 2 NADH carries high-energy electrons to the electron transport chain, where they are used to generate more ATP. What is the citric acid cycle also known as? The citric acid cycle is also known as the Krebs cycle or the tricarboxylic acid cycle. Where does the citric acid cycle take place in the cell? The citric acid cycle takes place in the mitochondria. What is the primary function of the citric acid cycle? The primary function of the citric acid cycle is to produce electron carriers (NADH and FADH2) and ATP, as well as to release carbon dioxide as a byproduct. How many times does the citric acid cycle turn per molecule of glucose? The citric acid cycle turns twice for each molecule of glucose because one glucose molecule is broken down into two pyruvate molecules, each entering the cycle. What are the products of the citric acid cycle? 3 The products of the citric acid cycle are 2 ATP, 6 NADH, 2 FADH2, and 4 CO2 molecules for each glucose molecule. What is the first step of cellular respiration? The first step of cellular respiration is glycolysis, where glucose is broken down into two molecules of pyruvate. How do NADH and FADH2 contribute to cellular respiration? NADH and FADH2 transport high-energy electrons to the electron transport chain, where they help generate ATP. What is the electron transport chain? The electron transport chain is a series of protein complexes in the inner mitochondrial membrane that transfer electrons and pump protons to create a proton gradient. Where does the electron transport chain occur in eukaryotic cells? The electron transport chain occurs in the inner mitochondrial membrane in eukaryotic cells. 4 What role does oxygen play in the electron transport chain? Oxygen acts as the final electron acceptor in the electron transport chain, combining with electrons and protons to form water.