Question

Differentiate between Aerobic and Anaerobic respiration.

Hint:

Aerobic respiration occurs in the presence of oxygen and releases large amounts of energy, while anaerobic respiration occurs without oxygen and releases less energy with products like alcohol or lactic acid.

Answer 1

Concept: Respiration is the biological process by which living organisms break down food (glucose) to release energy required for various life activities. Respiration can occur in the presence or absence of oxygen. Based on this, respiration is classified into aerobic respiration and anaerobic respiration.
Step 1:Aerobic Respiration.
Aerobic respiration is the process of breakdown of glucose in the presence of oxygen to release energy. Characteristics:

• Oxygen is required for the process.
• Complete breakdown of glucose occurs.
• A large amount of energy is released.
• The end products are carbon dioxide and water.

Example: Aerobic respiration occurs in most plants and animals. The general equation is: \[ C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{Energy} \]
Step 2:Anaerobic Respiration.
Anaerobic respiration is the breakdown of glucose in the absence of oxygen to release energy. Characteristics:

• Oxygen is not required.
• Incomplete breakdown of glucose occurs.
• Less energy is released compared to aerobic respiration.
• The end products may be alcohol and carbon dioxide (in yeast) or lactic acid (in muscle cells).

Examples:

• Fermentation in yeast produces alcohol and carbon dioxide.
• In human muscles, anaerobic respiration produces lactic acid during vigorous exercise.

Step 3:Difference between Aerobic and Anaerobic Respiration.

• Oxygen requirement: Aerobic respiration requires oxygen, whereas anaerobic respiration occurs without oxygen.
• Breakdown of glucose: Aerobic respiration causes complete breakdown of glucose, while anaerobic respiration causes incomplete breakdown.
• Energy released: Aerobic respiration releases more energy, whereas anaerobic respiration releases less energy.
• End products: Aerobic respiration produces carbon dioxide and water, while anaerobic respiration produces alcohol and carbon dioxide or lactic acid.