IGCSE Aerobic and Anaerobic Respiration

What is the role of oxygen debt in the body?

• Oxygen debt is used to store excess oxygen in the lungs.

• Oxygen debt helps convert lactic acid back to glucose in the liver after intense exercise.

• Oxygen debt is responsible for muscle fatigue during exercise.

• Oxygen debt is a result of dehydration in the body.

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Explain the concept of lactic acid in relation to anaerobic respiration.

• Lactic acid is produced as a byproduct of anaerobic respiration

• Lactic acid is only found in plant cells

• Lactic acid is a product of aerobic respiration

• Lactic acid is produced during photosynthesis

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Differentiate between anaerobic respiration and aerobic respiration.

• Anaerobic respiration requires oxygen, while aerobic respiration does not require oxygen.

• Anaerobic respiration releases more energy than aerobic respiration.

• Anaerobic respiration does not require oxygen, while aerobic respiration requires oxygen.

• Aerobic respiration releases more energy than anaerobic respiration

• Aerobic respiration releases carbon dioxide and water while anaerobic respiration releases lactic acid

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Write the balanced chemical equation for aerobic respiration.

• C6H12O6 + 6O2 -> 6CO2 + 6H2O

• 6CO2 + 6H2O -> C6H12O6 + 6O2

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How does anaerobic respiration in yeast contribute to bread making?

• Yeast anaerobic respiration produces carbon dioxide gas that causes the dough to rise and create a fluffy texture in bread.

• Yeast anaerobic respiration creates a sour taste in the bread.

• Yeast anaerobic respiration produces heat that bakes the bread faster.

• Yeast anaerobic respiration leads to the bread having a longer shelf life.

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What is the main product of anaerobic respiration in animals?

• Carbon dioxide

• Ethanol

• Glucose

• Lactic acid

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What are the end products of anaerobic respiration in muscles?

• Glucose and oxygen

• Lactic acid and energy

• Carbon dioxide and water

• Ethanol and carbon dioxide

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Why is anaerobic respiration less efficient than aerobic respiration?

• Anaerobic respiration produces more energy than aerobic respiration.

• Anaerobic respiration requires more oxygen than aerobic respiration.

• Aerobic respiration produces more energy than anaerobic respiration.

• Anaerobic respiration is faster than aerobic respiration.

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Discuss the impact of lactic acid build-up in muscles during exercise.

• Lactic acid build-up in muscles during exercise causes muscle fatigue and soreness.

• Lactic acid build-up in muscles during exercise is caused by excessive oxygen intake.

• Lactic acid build-up in muscles during exercise is a sign of dehydration.

• Lactic acid build-up in muscles during exercise is beneficial for muscle growth.

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Living things conduct respiration to release _________

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