The optimal pH for working of enzymes is _.
Correct answer: B. 7.5
- A. 5
- B. 7.5
- C. 9
- D. 3
Explanation
Option B is correct because the optimum PH for working enzyme is neutral which is around 7 which is closest to (7.5). Option A is incorrect because in acidic conditions, typical enzymes get denatured and only the digestive enzyme of the stomach has an optimum PH of 2.5. Option C is incorrect because in alkaline conditions, typical enzymes get denatured and only the enzyme catalase has an optimum PH of 9. Option D is incorrect because in acidic conditions, typical enzymes get denatured and only the digestive enzyme of the stomach has an optimum PH of 2.5.
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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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