4.2.2 Anaerobic Respiration

• What is anaerobic respiration?

  Respiration without oxygen
• Anaerobic respiration produces more ATP than aerobic respiration.

  False
• Match the type of respiration with its products:

  Anaerobic in animals ↔️ Lactic acid

  Anaerobic in plants ↔️ Ethanol

  Aerobic ↔️ Carbon dioxide and water
• Lactic acid fermentation produces lactic acid instead of carbon dioxide
• What is a common consequence of lactic acid buildup in muscles?

  Muscle fatigue
• Order the features of aerobic and anaerobic respiration:

  1️⃣ Oxygen required vs. not required

  2️⃣ High energy yield vs. low energy yield

  3️⃣ Products: carbon dioxide and water vs. lactic acid or ethanol
• Lactic acid fermentation can be used to produce yogurt.


  True
• Lactic acid fermentation produces only 2 ATP molecules.
• Lactic acid fermentation is an anaerobic process that occurs when cells break down glucose in the absence of oxygen.
• Alcoholic fermentation produces ethanol and carbon dioxide as final products.
• Alcoholic fermentation requires oxygen to occur.

  False
• Match the process with its use:

  Alcoholic fermentation ↔️ Baking bread

  Lactic acid fermentation ↔️ Yogurt production

  Aerobic respiration ↔️ Energy for cells
• The equation for lactic acid fermentation is C6H12O6 → 2C3H6O3.
• Anaerobic respiration is a process cells use to break down glucose without oxygen.
• Aerobic respiration requires oxygen and produces carbon dioxide and water as byproducts.
• Lactic acid fermentation is an anaerobic process that produces lactic acid.
• What are the final products of alcoholic fermentation?

  Ethanol and carbon dioxide
• Alcoholic fermentation is used in the production of beer, wine, and bread.


  True
• What is the overall chemical equation for alcoholic fermentation?

  $C_{6}H_{12}O_{6} \rightarrow 2C_{2}H_{5}OH +$$2CO_{2}$
• In alcoholic fermentation, glucose is converted into ethanol and carbon dioxide.


  True
• How much ATP is produced during anaerobic respiration in humans?

  2 ATP
• What is one key difference between anaerobic respiration in microbes and humans?

  Microbes can thrive without oxygen
• Anaerobic respiration releases energy without the presence of oxygen
• What is the energy yield of anaerobic respiration in ATP?

  2 ATP
• Lactic acid fermentation requires oxygen.

  False
• What is the oxygen requirement for anaerobic respiration?

  No oxygen
• Lactic acid fermentation is an example of anaerobic respiration that produces lactic acid
• Lactic acid fermentation leads to muscle fatigue and soreness due to lactic acid accumulation.


  True
• Lactic acid fermentation is used in the production of yogurt and cheese.


  True
• Order the energy yield of the three processes from lowest to highest:

  1️⃣ Lactic acid fermentation

  2️⃣ Alcoholic fermentation

  3️⃣ Aerobic respiration
• The products of alcoholic fermentation are ethanol and carbon dioxide.
• The chemical equation for alcoholic fermentation is C6H12O6 → 2C2H5OH + 2CO2.


  True
• Alcoholic fermentation produces lactic acid as a final product.

  False
• Anaerobic respiration yields more energy than aerobic respiration.

  False
• Anaerobic respiration does not require oxygen.


  True
• Alcoholic fermentation produces ethanol and carbon dioxide.


  True
• Alcoholic fermentation occurs in the absence of oxygen
• How many ATP molecules are produced during alcoholic fermentation?

  2 ATP
• The chemical equation for alcoholic fermentation starts with glucose
• What are the products of lactic acid fermentation?

  Lactic acid