What is cellular respiration?

Cellular respiration is the biochemical process by which cells convert glucose and oxygen into adenosine triphosphate (ATP), the energy currency of the cell. During this process, glucose is oxidized, and through a series of metabolic pathways—specifically glycolysis, the citric acid cycle (Krebs cycle), and oxidative phosphorylation—energy is released and captured in the form of ATP. This process is essential for powering various cellular activities and is a fundamental aspect of both aerobic and anaerobic metabolism.

The correct answer highlights the critical role of glucose and oxygen in producing ATP, which is vital for energy transfer within living organisms. By understanding the importance of this process, one can better appreciate how cells generate the energy needed for growth, repair, and maintaining homeostasis.