With the increase of enzyme concentration in a reaction, more_is/are available for the substrate.
Correct answer: C. Active sites
- A. Binding sites
- B. Products
- C. Active sites
- D. Activation energy
Explanation
Increasing the concentration of enzymes in a reaction amplifies the number of available active sites. More active sites mean that more substrate molecules can bind at any given time, enhancing the reaction rate. This is why 'active sites' is the correct answer. The other options are incorrect: 'binding sites' is a less specific term, 'products' refers to the reaction outcome, not the binding process, and 'activation energy' is about the energy needed to start a reaction, which enzymes help to reduce, not increase with concentration.
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About Enzymes
Enzymes are biological catalysts that lower activation energy without being consumed, and their specificity is explained by the lock and key and induced fit models. Work includes the effects of temperature, pH and substrate concentration on reaction rate, plus competitive and non-competitive inhibition and how these differ.
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