When Amanda poured some of the liquid into a test tube, the water curved upwards because of adhesion.
Water has many interesting properties. One of its many properties is its affinity for adhesion. Adhesion is simply what occurs when a molecule of one kind is attracted to a different kind of molecule.
In the case of Amanda, the water will have curved upwards as an example of the adhesion properties of the water, in which its molecules were attracted towards the edges of the test tube.
Allosteric regulation occurs at these points where the concentration of the substrate and/or products is important for the activation and inhibition of the enzyme.
