If more substrate is added to an already occurring enzymatic reaction, then more enzyme activity is seen because?
Correct answer: D. There is probably more enzyme available than there is substrate available
- A. There is probably more substrate present than there is enzyme
- B. There is probably more product present than either substrate or enzyme
- C. The enzyme substrate complex is probably failing to from during the reaction
- D. There is probably more enzyme available than there is substrate available
Explanation
Initially, an increase in substrate concentration leads to an increase in the rate of an enzyme-catalyzed reaction. As the enzyme molecules become saturated with substrate, this increase in reaction rate levels off. The rate of an enzyme-catalyzed reaction increases with an increase in the concentration of an enzyme.
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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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