Question

Only small amounts of enzymes are required for reactions within cells because enzymes are?

Answer 1

Biological catalysts

Explanation:

Enzymes are biological catalysts which speed up chemical reactions in our body without being used up. Each enzyme corresponds to one specific substrate, and then breaks it down into simpler products. For example, pepsin will work only on proteins, and then break them down into amino acids.

In a reaction, a small presence of a catalyst is enough to lower down the activation energy of the reaction, so not much is needed to start the reaction.