Answer:
The three factors that affect an enzyme's capability to catalyze chemical reactions are: (option a)
a) Temperature: Enzymes have an optimal temperature range at which they function most efficiently. Higher temperatures can increase the rate of enzyme-catalyzed reactions, but if the temperature exceeds the enzyme's optimal range, it can denature the enzyme and render it nonfunctional.
pH: Enzymes also have an optimal pH range at which they work best. Changes in pH can affect the shape and charge of the enzyme, thereby altering its activity. Different enzymes have different pH optima, and deviations from this range can decrease enzyme activity.
Substrate concentration: Enzyme activity is influenced by the concentration of substrates (the molecules that the enzyme acts upon). Initially, as substrate concentration increases, enzyme activity also increases, as more enzyme-substrate complexes can form. However, at a certain point, the enzyme becomes saturated with substrates, and further increases in substrate concentration do not lead to a proportional increase in reaction rate.
In summary, the factors that affect an enzyme's capability to catalyze chemical reactions are temperature, pH, and substrate concentration. These factors can influence enzyme activity and the rate at which reactions occur.