In which biological process would you most likely find the action of enzymes?

Enzymes are biological catalysts that accelerate chemical reactions, and they play a crucial role in many metabolic processes, including both photosynthesis and cellular respiration.

In photosynthesis, enzymes facilitate the conversion of carbon dioxide and water into glucose and oxygen, using sunlight as the energy source. For instance, enzymes such as ribulose bisphosphate carboxylase/oxygenase (RuBisCO) are critical for the first step of the Calvin cycle, which synthesizes carbohydrates.

Similarly, in cellular respiration, enzymes are involved in breaking down glucose to produce energy in the form of ATP. Key enzymes like those found in glycolysis, the Krebs cycle, and the electron transport chain are essential for these reactions to occur efficiently.

Given their critical roles in both processes, the correct answer is that enzymes would most likely be found in both photosynthesis and cellular respiration.