Practice!

Sample Problem

Please label the following statements with a “T” or “F” for true or false, respectively.

Enzymes are not affected by their environment.

All enzymes function in the same optimal conditions.

Coenzymes help enzymes work better and faster.

Any enzyme in a very acidic solution or extreme temperature will begin to denature.

Once an enzyme loses its shape integrity, it cannot carry out its function.

Solution

The answers are as follows: F, F, T, F, T. Enzymes are very much affected by their environment, and all enzymes function in different optimal conditions. Coenzymes are vitamins that help enzymes work faster. Although some enzymes will denature in acidic solutions or extreme temperatures, not all enzymes will. For example, enzymes in your stomach function happily at a pH of 2. That was a bit tricky. Don’t be fooled! Lastly, once enzymes lose their shape, they no longer have a functioning active site, so it cannot work on substrates.