Question

Glucose is oxidized to produce ethyl alcohol or lactic acid during the process of:

• A. Breathing
• B. Anaerobic respiration
• C. Combustion
• D. Aerobic respiration

Answer 1

The correct option is B

Anaerobic respiration

The correct option is B.

Explanation of correct option:

1. In anaerobic respiration, glucose is partially oxidized into ethyl alcohol (in plants) and lactic acid (in animals), and carbon dioxide in absence of oxygen.
2. The energy released is less in this process.
3. It takes place in lower organisms like yeast.

(Glucose) C₆H₁₂O₆ → (Ethyl alcohol) 2C₂H₅OH + 2CO₂ + 2ATP

Explanation of incorrect options:

Option A:

1. Breathing is the process of gaseous exchange between organisms and the environment.
2. Inhalation of air and exhalation of carbon dioxide in the environment takes place in this process.

Option C:

1. Combustion is a process of burning sugar to form carbon dioxide and water.
2. The energy released is in the form of heat.

Option D:

1. Aerobic respiration is a type of respiration in which glucose is fully oxidized into carbon dioxide and water.
2. The energy released is more in this process

Final answer: Glucose is oxidized to produce ethyl alcohol or lactic acid during the process of anaerobic respiration.