If the concentration of the substrate molecule is higher than the enzyme, then the rate of reaction would be:
Correct answer: C. Remain constant
- A. Increasing
- B. Decreasing
- C. Remain constant
- D. Variable
Explanation
When the concentration of substrate molecules exceeds that of enzymes, the enzymes become saturated, meaning they are all occupied and working at their maximum capacity. This results in the reaction rate reaching a plateau, where it remains constant despite any further increase in substrate concentration. Therefore, the correct answer is 'Remain constant'. Other options are incorrect because the reaction rate does not increase, decrease, or vary under these conditions.
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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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