12.1 - Glycolysis 0.0 / 5 ? BiologyRespirationA2/A-levelAQA Created by: Megan2413Created on: 13-10-17 19:52 What are the four stages of aerobic respiration? - glycolysis - link reaction - krebs cycle - oxidative phosphorylation 1 of 16 Which stage is actually an anaerobic stage? glycolysis 2 of 16 Where does glycolysis take place? In the cytoplasm 3 of 16 Why is glycolysis essential to aerobic respiration? Glucose is too big a molecule to diffuse through the mitochondrial membranes into the matrix hence it needs to be broken down 4 of 16 What are the four stages to glycolysis? - Phosphorylation of glucose - Splitting of phosphorylated glucose - Oxidation of triose phosphate - Production of ATP 5 of 16 Describe what happens during the phosphorylation of glucose Two ATP molecules are hydrolysed into ADP and Pi. The glucose is then activated by the phosphorylation by the Pi molecule from the hydrolyses of ATP 6 of 16 How many Pi molecules are added to the glucose molecule to activate it? 2 Pi molecules 7 of 16 Apart from the Pi released- how does the hydrolysis of ATP aid glycolysis? It provides energy to activate glucose which then lowers its activation energy 8 of 16 What is phosphorylated glucose split into? Two triose phosphate molecules 9 of 16 How many carbons does triose phosphate contain? 3 carbons 10 of 16 What happens during the oxidation of triose phosphate? Hydrogen is removed from each triose phosphate molecule and transferred to a hydrogen carrier molecule known as NAD to form reduced NAD 11 of 16 What 3 carbon molecule is produced by this? pyruvate molecule 12 of 16 How many ATP molecules are then reformed by one triose phosphate molecule? 2 13 of 16 What is the net gain of ATP during one glycolysis reaction? 2 ATP molecules 14 of 16 How many reduced NAD molecules are produced during glycolysis? 2 reduced NAD molecules 15 of 16 How many pyruvate molecules are produced during one glycolysis reaction? 2 pyruvate molecules 16 of 16
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