Question

The given figure shows the fate of glucose during aerobic and anaerobic respiration. Identify the end products that are formed at stages indicated as A, B, C and D.

• A. A = ETS, B = pyruvic acid, C = ethyl alcohol and carbon dioxide, D = lactic acid
• B. A = glycolysis, B = carbon dioxide and water, C = bacteria, D = ethyl alcohol and carbon dioxide
• C. A = pyruvic acid, B = carbon dioxide and water, C = ethyl alcohol and lactic acid, D = fungi
• D. A = ETS, B = ethyl alcohol and carbon dioxide, C = lactic acid, D = carbon dioxide and water

Answer 1

The correct option is B A = glycolysis, B = carbon dioxide and water, C = bacteria, D = ethyl alcohol and carbon dioxide

Pyruvic acid is the final product of glycolysis.
Krebs cycle releases CO${}_2$​ and water.
Bacteria produces lactic acid via fermentation.
Ethyl alcohol is produced as a result of fermentation in yeast, along with that, CO${}_2$​ is released as a by-product.
So, the correct answer is A = glycolysis, B = carbon dioxide and water, C = bacteria, D = ethyl alcohol and carbon dioxide.