Final answer:
Enzymes are biological molecules that speed up chemical reactions by lowering the activation energy required. They are not destroyed upon use and are crucial for many essential processes in our body.
Step-by-step explanation:
Enzymes are biological molecules that speed up chemical reactions in living organisms. They are important because they allow reactions to occur at a faster rate, without being consumed or destroyed in the process.
Enzymes work by lowering the activation energy required for a chemical reaction to take place. This means that they reduce the amount of energy needed to start a reaction, making it easier and faster for the reaction to occur.
For example, enzymes in our digestive system help break down complex molecules in the food we eat into simpler ones that our body can absorb and use for energy. Without enzymes, these reactions would occur too slowly to meet our metabolic needs.
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