If more substrate is added to an already occurring enzymatic reaction, then more enzyme activity is seen because of which of the following?
Correct answer: D. There is probably more enzyme available than there is substrate
- A. There is probably more substrate present than there is enzyme
- B. There is probably more product present than there is either substrate or enzyme
- C. The enzyme-substrate complex is probably failing to form during the reaction
- D. There is probably more enzyme available than there is substrate
Explanation
An increase in enzyme activity seen on adding more substrate to an ongoing reaction indicates more enzyme is present compared to substrate molecules which were free to form enzyme-substrate complexes.
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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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