Question

Mark the wrong statement:

• A. Carbon dioxide is always released in anaerobic respiration
• B. Anaerobic respiration takes place in the cytoplasm
• C. The process of respiration in mammalian red blood cells is carried out anaerobically
• D. More energy is produced in aerobic respiration when compared to anaerobic respiration

Answer 1

The correct option is A Carbon dioxide is always released in anaerobic respiration

Anaerobic respiration is the process by which the food is oxidized without using oxygen. The term fermentation is often used in this process which is defined as the anaerobic breakdown of carbohydrates and other organic compounds by the microorganisms into organic acids, alcohols, and gases, etc. In alcoholic fermentation, ethanol is produced from glucose along with carbon dioxide by yeasts. In lactic acid fermentation that happens in muscles and parasitic worms like Ascaris etc., lactic acid is produced from glucose without releasing carbon dioxide. In cellulose fermentation, volatile fatty acids are produced from cellulose. So carbon dioxide is not always produced in anaerobic respiration.
Unlike aerobic respiration, anaerobic respiration doesn’t need mitochondria, so it happens in the cytoplasm only.
Mammalian red blood cells (RBCs) lack mitochondria, so it can’t perform aerobic respiration. As a result, only anaerobic respiration occurs there.
In anaerobic respiration, the food is not completely metabolized. So it is not as efficient as aerobic respiration. In aerobic respiration, the food is completely oxidized using molecular oxygen to release energy, carbon dioxide, water, etc. In this, more energy is produced than anaerobic respiration.