Answer:
The correct answer is cellular respiration is a single chemical reaction with just one step.
Step-by-step explanation:
Cellular respiration is a process which includes 3 principle metabolic pathways 1 glycolysis 2 TCA cycle 3 oxidative phosphorylation.
Glycolysis is a 10 steps enzyme catalyzed reaction during which glucose is converted to pyruvate.Glycolysis occur within cytosol of a cell.
The next two pathways TCA cycle and oxidative phosphorylation are multi step process in which the pyruvate undergo various enzyme catalyzed biochemical reaction to produce CO2,H2O and ATP in form of energy.
From this point of view it can be stated that cellular respiration is not a single step reaction.