Question

the image above shows a step in the process of an enzyme catalyzing a reaction. which of the choices below best describes this step?
select the correct answer below:
the enzyme - substract complex weakens bonds in the substrate, allowing it to break into smaller molecules.
products leave the active site of the enzyme.
a substrate is converted to products, and an enzyme/product complex is formed.
a substrate approaches the active site of the enzyme.

Explanation:

In enzyme - catalyzed reactions, the first step is the substrate approaching the active site of the enzyme. The image shows a substrate (green) moving towards the enzyme (gray) with an active site. The other options describe later steps in the enzyme - catalyzed reaction process. For example, "The enzyme - substract complex weakens bonds in the substrate, allowing it to break into smaller molecules" occurs after the substrate has bound to the enzyme. "Products leave the active site of the enzyme" is the final step. "A substrate is converted to products, and an enzyme/product complex is formed" is also a step that happens after the initial binding of the substrate to the enzyme.

Answer:

A substrate approaches the active site of the enzyme.