EVERYDAY SCIENCE

Detailed explanation-1: -Glycolysis occurs in both aerobic and anaerobic states. In aerobic conditions, pyruvate enters the citric acid cycle and undergoes oxidative phosphorylation leading to the net production of 32 ATP molecules.

Detailed explanation-2: -Glycolysis is the metabolic process that serves as the foundation for both aerobic and anaerobic cellular respiration. Although it doesn’t require oxygen (its purpose in anaerobic respiration) it is also the first step in cellular respiration.

Detailed explanation-3: -Answer and Explanation: The correct answer is e. Oxygen is not required. The statement regarding glycolysis which is true is oxygen is not required.

Detailed explanation-4: -During the absence of oxygen (anaerobic conditions) and in the cells lacking mitochondria, anaerobic glycolysis prevails. The pyruvate is reduced to lactate as NADH is reoxidized to NAD+ by lactate dehydrogenase. This process is an important source of ATP for cells that lack mitochondria such as erythrocytes.

Detailed explanation-5: -Glycolysis is common to both aerobic and anaerobic respiration because glucose is the only source of energy and the process of glycolysis is independent of oxygen. Thus, the absence or presence of oxygen does not play a role in this process which is common to both aerobic and anaerobic respiration.