Cellular Respiration

• What type of reaction is Cellular Respiration?


  It is a catabolic and exergonic reaction.
• How are free electrons from catabolic reactions used in Cellular Respiration?


  They are used as a source for producing ATP.
• When does Aerobic Cellular Respiration occur?


  When there is oxygen present within the cell.
• What is the order of the stages in Cellular Respiration?

  Glycolysis, Link Reaction, Kreb’s Cycle, and the Electron Transport Chain.
• What are the products yielded from the entire process of Cellular Respiration?


  H₂O, CO₂, and 36-38 ATP.
• What are the two stages of Glycolysis?


  • Energy Investment
  • Energy Payoff
• What happens during the Energy Investment stage of Glycolysis?


  Glucose is broken apart using 2 ATP molecules.
• What is the chemical formula for glucose?


  C₆H₁₂O₆
• What is produced during the Energy Payoff stage of Glycolysis?


  2 NADH and 4 ATP per glucose molecule.
• What are the products of Glycolysis?


  2 Pyruvate, 2 ATP (net gain), and 2 NADH.
• What occurs during the Link Reaction?


  Pyruvate loses a carbon and turns into Acetate.
• What is another name for the Link Reaction?


  Pyruvate Decarboxylation.
• What attaches to Acetate to form Acetyl CoA during the Link Reaction?

  Co-Enzyme A.
• What are the products of the Link Reaction?


  CO₂, reduced NAD, and Acetyl CoA.
• What is the purpose of the Krebs Cycle?


  To transfer high energy electrons to the Electron Transport Chain.
• What is produced during the Krebs Cycle?


  2 molecules of ATP per glucose molecule.
• How are electrons transferred during the Krebs Cycle?


  They are transferred to NAD+ and FAD to make NADH and FADH₂.
• What is substrate-level phosphorylation?


  It is when a phosphoryl group is transferred from a substrate to ADP or GDP to form ATP or GTP.
• What happens to all carbon groups of the original glucose molecule during aerobic cellular respiration?


  They have been released as CO₂ gas.
• What are the two processes involved in Oxidative Phosphorylation?


  • The Electron Transport Chain
  • Chemiosmosis
• What do NADH and FADH₂ do during the Electron Transport Chain?


  They donate electrons and protons.
• What happens during Chemiosmosis?


  H+ ions move across a gradient into the inner membrane space to form ATP.