When enzymes are exposed to very high temperatures, the most likely result is that they denature and lose their function.

Quick Scoop

At first, warming an enzyme makes it work faster because molecules move more quickly and collide more often, so the reaction rate rises. Once the temperature goes past the enzyme’s optimum range, the heat disrupts the weak bonds (like hydrogen and ionic bonds) that hold its three‑dimensional shape together, especially around the active site. This structural change is called denaturation, and it is usually irreversible; the enzyme’s active site no longer fits the substrate, so the reaction slows sharply or stops altogether.

So, for a multiple‑choice style question such as “Which result is most likely if enzymes are exposed to very high temperatures?”, the correct choice is:

  • They become denatured and can no longer catalyze reactions effectively (loss of function).

Bottom line: very high heat doesn’t just make enzymes work faster; it destroys their shape, so they stop working.

TL;DR: Very high temperatures cause enzymes to denature, changing their shape and making them inactive.

Information gathered from public forums or data available on the internet and portrayed here.