Plants and Yeast

• What is anaerobic respiration?

  Breakdown of glucose without oxygen
• What is yeast?

  A single-celled microscopic fungus
• What is the role of yeast in industries?

  Used in brewing and baking industries
• What is cellulose?

  Main substance in plant cell walls
• What are the products of anaerobic respiration in plants and fungi?

  Carbon dioxide and ethanol
• Why do plants and fungi use anaerobic respiration?

  To survive in low oxygen environments
• What is the word equation for anaerobic respiration in plants and microorganisms?

  Glucose → ethanol + carbon dioxide
• What are the similarities and differences between anaerobic respiration in animals and plants/fungi?

  Similarities:

  • Uses glucose
  • Releases energy
  • Happens in the cytoplasm

  
  

  Differences:

  • Animals produce lactic acid
  • Plants/fungi produce carbon dioxide and alcohol
• What is fermentation?

  Microorganisms respiring anaerobically to produce alcohol
• Why is anaerobic respiration economically important?

  It produces many foods through microorganisms
• How is fermentation conducted?

  Microorganisms are kept in large tanks without oxygen
• What does yeast break down to produce in alcoholic drinks?

  Sugars found in grapes or barley
• How does yeast contribute to bread making?

  It produces carbon dioxide that makes bread rise
• What conditions does yeast need to grow?

  A warm environment for optimal growth
• What happens to yeast at high temperatures?

  Yeast cells will stop respiring and die
• What is the main difference between anaerobic respiration in animals and plants/fungi?

  Animals produce lactic acid, plants produce alcohol
• What is the main product of anaerobic respiration in yeast?

  Ethanol
• What is the main product of anaerobic respiration in plants?

  Carbon dioxide