The type of respiration that involves the step-by-step breakdown of carbon chain molecules in the cell is called

Explanation

The correct answer is cellular respiration. This process involves the breakdown of carbon chain molecules, such as glucose, within cells to produce ATP, the energy currency of the cell. The breakdown occurs in several stages, including glycolysis, the citric acid cycle, and oxidative phosphorylation. External respiration and pulmonary respiration refer to the exchange of gases at the respiratory system level, not at the cellular level. Cutaneous respiration involves gas exchange through the skin and is unrelated to the cellular metabolic processes of energy conversion.