Is+Yeast+Alive?

Summary: Live yeast is necessary for oxidisation to occur. Oxidation is which electrons are lost. Reduction is which electrons are gained. Yeast cells cannot control the diffusion of methylene blue through the plasma membrane.

Knowledge: 1. Breathing and cellular respiration are different processes of respiration. 2. Mitochondrion is site for the release of potential energy in cellular respiration. 3. Enzymes are crucial in the control of metabolic pathways. 4. Glucose is the main respiratory substrate. 5. Oxygen is the final electron acceptor and the formation of water. 6. Aerobic respiration releases a much greater amount of energy per glucose molecule than anaerobic respiration. 7. Respiratory system is adapted for its function as a mechanism to obtain oxygen for respiration and to excrete waste (carbon dioxide)

Skills: 1. State the uses of energy in the body of humans: muscle contraction, protein synthesis, cell division, active transport, growth, the passage of nerve impulses and the maintenance of a constant body temperature. 2. Define aerobic respiration in words or symbols. 3. Describe the roles of enzymes in the control of respiratory pathways, illustrated by oxidoreductases andhydrolases. 4. Identify the main steps of cellular respirationL glycolysis, Kreb cycle and electron transport chain of hexose molecules 6. Describe the role of oxygen as the final electron acceptor and the formation of water. 7. Indicate on a diagram or micrograph of a mitochondrion, where each stage of the cellular respiration occurs. 8. define anaerobic respiration