Oxygen, as the patriarch of metabolism, knows that it is worth the wait, as it controls the fate of endurance and is the sustenance of life. The preparatory reaction, which divides each 3-carbon molecule into a 2-carbon molecule and CO2; 3. 1. Glycolysis, the splitting of glucose into two 3-carbon molecules; 2. ATP are produced. Want to read all 11 pages? However, aerobic metabolism is the slowest way to resynthesize ATP. This produces 2 ATP and 6 NADH , for every glucose molecule entering glycolysis. 1. In the former, only glycolysis occurs and produces two ATP; in eukaryotes, the subsequent Krebs cycle and electron transport chain complete cellular respiration to add 36 to 38 ATP. Without oxygen, under anaerobic conditions, much less (only two!) Stage 1 - where the food particles are digested into macromolecules by physical mechanisms and … The citric acid or Krebs cycle, which produces CO2, NADH, FADH2, and ATP; 4. You've reached the end of your free preview. 7.2 Phases of Complete Glucose Breakdown; The complete oxidation of glucose involves four phases. The hexose sugar glucose is a source of energy in the form of ATP in all cells, both prokaryotic and eukaryotic. The metabolic reactions that take place in the presence of oxygen are responsible for most of the cellular energy produced by the body. Most of the ATP produced during cellular respiration is made during this stage. Which stage of glucose metabolism produces the most atp? Here, the process used to produce ATP from potential energy created through the movement of protons is known as Oxidative Phosphorylation. The Krebs cycle produces the CO 2 that you breath out. For each glucose that starts cellular respiration, in the presence of oxygen (aerobic conditions), 36-38 ATP are generated. Electron transport chain This stage produces most of the energy ( 34 ATP molecules, compared to only 2 ATP for glycolysis and 2 ATP for Krebs cycle). Determine the amount of ATP produced by the oxidation of glucose in the presence and absence of oxygen. Metabolism in living organisms can be divided into three stages - a. Question 5 (5 points) In which of the following steps of glucose metabolism is the greatest number of ATP molecules produced? Phase 1. ATP is a molecule that supports a variety of life functions. The 2 pyruvic acids each contain 3 carbon atoms (the original glucose molecule had 6) , and there is a net gain of 2 ATP (2 are invested to split the glucose, and 4 … Question 5 options: Alcohol Fermentation Chemiosmosis Glycolysis The Citric Acid Cycle. Glycolysis can be divided into two phases: energy consuming (also called chemical priming) and energy yielding. … In stage II of catabolism, the metabolic pathway known as glycolysis converts glucose into two molecules of pyruvate (a three-carbon compound with three carbon atoms) with the corresponding production of adenosine triphosphate (ATP). Electron transport is the last stage of aerobic respiration in cellular respiration. * Under aerobic conditions, the three stages of cellular metabolism produce a total of 36 ATP molecules. Answers: 3, question: answers the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar. Anaerobic conditions result in the production of 2 ATP molecules from glycolysis in particular. The Krebs cycle takes place inside the mitochondria. The Krebs cycle first produces citric acid, and it produces carbon dioxide as an end product. It results in the production of adenosine triphosphate, or ATP. The first phase is the energy-consuming phase, so it requires two ATP molecules to start the reaction for each molecule of glucose.However, the end of the reaction produces four ATPs, resulting in a net gain of two ATP energy molecules.