Final answer:
Reactions that follow Michaelis-Menten kinetics have a hyperbolic graph. This relationship is observable when reaction velocity is plotted against substrate concentration, illustrating the enzyme saturation kinetics.
Step-by-step explanation:
Reactions that follow Michaelis-Menten kinetics are characterized by a graph that is hyperbolic. This type of kinetics is common to many enzymes. When we graph the rate of reaction (velocity) versus the substrate concentration [S], the curve formed represents a rectangular hyperbola.
Michaelis and Menten, along with assumptions made by G. E. Briggs and J. B. S. Haldane, demonstrated that enzyme-catalyzed reactions often reach a point where increasing substrate concentration no longer increases the reaction rate (saturation kinetics). This behavior is consistent with saturation kinetics, and when the substrate concentration is significantly larger than the Michaelis constant (Km), the reaction rate approaches a constant maximum velocity (Vmax).
Thus, the correct answer to the student's question is A) Hyperbolic.