* Enzymes: Enzymes belong to the class of proteins. Proteins are large, complex molecules made up of chains of amino acids.
* Why enzymes are proteins: Enzymes act as biological catalysts, speeding up chemical reactions without being consumed themselves. The intricate three-dimensional structure of proteins allows for the specific binding of substrates (molecules they act upon) and the precise execution of catalytic activity.
* Starches: Starches are carbohydrates. They are complex carbohydrates made up of long chains of sugar molecules (primarily glucose).
* Why starches are carbohydrates: Starches serve as energy storage molecules in plants. The bonds within the starch chains store chemical energy, which can be released by our bodies through digestion.
