Question

enzymes help speed up chemical reactions by lowering the activation energy (the amount of energy needed to start a reaction). which graph below shows an enzyme being used because less energy is needed? two graphs (graph a, graph b) showing energy vs reaction progress with reactants, products, and activation energy labels. options: graph a, graph b (radio buttons).

Explanation:

Enzymes lower activation energy. Graph A has a higher energy peak (more activation energy), while Graph B has a lower peak labeled "Less activation energy required", matching the enzyme's effect.

Answer:

Graph B