Put the steps of enzyme activity in order from first to last using the drop down menu beside each step.
The chemical reaction occurs.
A substrate enters the active site of enzyme.
New substances called "products" are formed.
The enzyme and the substrate bind to form the enzyme-substrate complex.
DONE

is this a psat question, if so do not cheat try your best.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.