7.2.4 Anaerobic Respiration

• What is anaerobic respiration?

  Respiration without oxygen
• Anaerobic respiration occurs without oxygen.oxygen
• Why is anaerobic respiration important?

  Rapid energy source
• In animals, anaerobic respiration produces lactic acid
• Steps of anaerobic respiration in yeast

  1️⃣ Glycolysis: Glucose is broken down into pyruvate

  2️⃣ Pyruvate is converted into ethanol and carbon dioxide
• Anaerobic respiration is more efficient than aerobic respiration.

  False
• What is the primary purpose of anaerobic respiration?

  Generate energy without oxygen
• Anaerobic respiration yields a small amount of ATP.
• Match the products of anaerobic respiration with the organism:

  Animals ↔️ Lactic acid

  Yeast ↔️ Ethanol and Carbon dioxide
• Anaerobic respiration allows animals to survive during intense activity when oxygen is limited.
• Give an example of when anaerobic respiration is used in animals.

  During sprinting
• Steps of anaerobic respiration in animals

  1️⃣ Glycolysis: Glucose is broken down into pyruvate

  2️⃣ Pyruvate is converted into lactic acid
• How many ATP are produced per glucose molecule in anaerobic respiration?

  2 ATP
• Anaerobic respiration occurs when oxygen is limited.
• Unlike aerobic respiration, anaerobic respiration yields less ATP but is faster
• What is the purpose of anaerobic respiration?

  Generate ATP
• Anaerobic respiration in animals enables survival during intense activity
• Match the organism with the importance of anaerobic respiration:

  Animals ↔️ Enables survival during intense exercise

  Yeast ↔️ Used in brewing and baking industries
• Glycolysis occurs in the cytoplasm during anaerobic respiration in animals.
• In animals, pyruvate is converted to lactic acid to recycle NAD+
• What is a common byproduct of anaerobic respiration in animal muscles?

  Lactic acid
• In yeast, pyruvate is converted into ethanol and carbon dioxide
• How many ATP molecules are produced during glycolysis in anaerobic respiration?

  2 ATP
• Anaerobic respiration occurs without oxygen.
• Match the organism with its end product in anaerobic respiration:

  Animals ↔️ Lactic acid

  Yeast ↔️ Ethanol and CO₂
• What is a key similarity in anaerobic respiration across different organisms?

  Rely on glycolysis
• In animals, lactic acid buildup during anaerobic respiration can cause muscle fatigue
• Where does glycolysis occur in cells during anaerobic respiration?

  Cytoplasm
• Anaerobic respiration in animals produces ethanol.

  False
• What two compounds are produced from pyruvate in yeast during anaerobic respiration?

  Ethanol and carbon dioxide
• During glycolysis, glucose is broken down into pyruvate, ATP, and NADH
• Anaerobic respiration yields the same amount of ATP as aerobic respiration.

  False
• Match the organism with its specific circumstance in anaerobic respiration:

  Animals ↔️ Intense exercise

  Yeast ↔️ Fermentation

  Some plants ↔️ Waterlogged soils
• What byproduct of anaerobic respiration in animals causes muscle fatigue?

  Lactic acid
• Anaerobic respiration produces 2 ATP per glucose molecule.
• Aerobic respiration produces 36-38 ATP, while anaerobic respiration produces only 2
• Match the respiration type with its ATP yield and oxygen requirement:

  Anaerobic ↔️ 2 ATP, No oxygen

  Aerobic ↔️ 36-38 ATP, Requires oxygen
• Anaerobic respiration requires oxygen.

  False
• How many ATP molecules are produced per glucose molecule in anaerobic respiration?

  2 ATP
• Aerobic respiration requires oxygen to produce energy.