The function of an enzyme is to:
Correct answer: B. Change the rate of a chemical reaction
- A. Cause chemical reactions that would not otherwise take place
- B. Change the rate of a chemical reaction
- C. Change the direction of a chemical reaction
- D. Raise the activation energy of a chemical reaction
- E. None of the given reactions
Explanation
Option A: Enzymes can not initiate a chemical reaction.They can only accelerate a chemical reaction.So,option A is incorrect.Option B: Enzymes accelerate a chemical reaction by reducing the activation energy of a specific chemical reaction.So,Option B is correct.Option C: Enzymes can not change the direction of a given reaction.They can only speed up an already started reaction.So,Option C is incorrect.Option D: Enzymes do not raise the activation energy.Enzymes actually decrease the activation energy to lower the energy required for the process.So, Option D is incorrect.Option E: We have already found the correct answer, so this option is incorrect.
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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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633 free Enzymes MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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