Solution

As substrate concentration increases, the velocity of an enzyme-catalysed reaction rises initially and then plateaus at $V_{max}$, since all enzyme molecules become saturated with substrate and no free enzyme molecules remain to bind additional substrate. This gives a hyperbolic (rectangular hyperbola) curve.

Concept Enzyme kinetics - effect of substrate concentration

Biomolecules in past papers

107 questions from this chapter have appeared across 26 exam years.