You coat a Petri dish with fibronectin and proteoglycans and then culture cells on the dish. The cells adhere to the dish. You repeat the experiment but this time add RGD tripeptides to the culture dish as the cells are added. The result of this experiment is an example of what biochemical process?
A)competitive inhibition
B)noncompetitive inhibition
C)enzymatic activation
D)feedback inhibition
E)allosterism

Question

Quizplus · Accepted Answer

The addition of RGD tripeptides, which mimic the cell adhesion sites on fibronectin and proteoglycans, competes with these molecules for binding to cell surface receptors, thus preventing the cells from adhering to the dish. This is an example of competitive inhibition, where the inhibitor (RGD tripeptides) competes with the substrate (fibronectin and proteoglycans) for the active site on the target (cell surface receptors).

You Coat a Petri Dish with Fibronectin and Proteoglycans and Then