During cellular respiration, what is mainly produced alongside ATP?

During cellular respiration, the process primarily involves the breakdown of glucose to generate energy in the form of ATP. As glucose is metabolized, it undergoes a series of reactions, including glycolysis, the citric acid cycle (Krebs cycle), and oxidative phosphorylation.

One of the key outcomes of this metabolic process is the production of carbon dioxide. Specifically, during the citric acid cycle, the carbon atoms from glucose are released in the form of carbon dioxide as waste products. This carbon dioxide is then transported out of the cells and eventually exhaled by organisms. Hence, alongside the production of ATP, carbon dioxide is a significant byproduct of cellular respiration, reflecting the complete oxidation of glucose.

Other options, such as glucose itself, are consumed during respiration rather than produced. Nitrogen and hydrogen, while they do play roles in various biochemical processes, are not the primary outputs in cellular respiration. Thus, the main byproduct alongside ATP during this process is indeed carbon dioxide.