According to the video, which one of the following best describes how enzymes might help to stabilize transition states?

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BlackTom AI · Accepted Answer

The prompt asks us to consider how enzymes might help stabilize transition states, based on the video.
Option 1: Providing suitably-placed reactive groups. This aligns with the classic view that enzymes stabilize transition states by positioning catalytic residues or cofactors so that they interact precisely with the substrate in the transition-state configuration, lowering the activation energy.
Option 2: Increasing the temperature of the reaction. While higher temperature can speed reactions, enzymes usually work by precise chemical interactions rather than simply increasing kinetic energy; raising temperature can denature enzymes and is not a mechanism for stabilizing transition states.
Option 3: Supplying more reactant. Merely increasing reactant concentration does not address the stabilization of the transition state; it affects reaction rate via collision frequency but not the enzyme-substrate complementarity or transition-state stabilization.
Option 4: Increasing the reaction volume. Expanding volume would generally decrease effective concentrations and could reduce the rate of encounter between enzyme and substrate; it does not contribute to stabilizing a high-energy transition-state complex.
In summary, the most mechanistically accurate idea is that enzymes stabilize the transition state by placing reactive groups in optimal positions to facilitate the chemical transformation, whereas the other options either disrupt proper catalysis or fail to address the transition-state stabilization mechanism.

BIOL3612.MERGED.202610 Activity Questions 3B: Catalysis

According to the video, which one of the following best describes how enzymes might help to stabilize transition states?

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