Models reaction velocity as Vmax times substrate over Km plus substrate, describing enzyme saturation.
The equation v = Vmax[S]/(Km + [S]) gives a hyperbolic curve. Km is the substrate concentration giving half-maximum rate and reflects affinity: low Km means high affinity. Vmax is reached when all active sites are occupied.
Lineweaver-Burk plots (1/v against 1/[S]) linearise data to extract Km and Vmax and diagnose inhibition type.
Models reaction velocity as Vmax times substrate over Km plus substrate, describing enzyme saturation.
Michaelis-Menten Kinetics is one of the 51 topics in Biomolecules & Biochemistry. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Noncompetitive Inhibition, Competitive Inhibition, Cooperativity.
A competitive inhibitor increases Km but not Vmax; a noncompetitive one lowers Vmax.
Work through the Beginner topics in Biomolecules & Biochemistry first, such as Water Properties, Carbon Chemistry, Carbohydrates, then return to Michaelis-Menten Kinetics. Advanced topics assume the Intermediate vocabulary.
The closest topics to Michaelis-Menten Kinetics are Noncompetitive Inhibition, Competitive Inhibition, Cooperativity, Factors Affecting Enzymes. Comparing them side by side is a good way to see how the ideas connect.
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Michaelis-Menten Kinetics. To practise the whole of Biomolecules & Biochemistry, use the Biomolecules & Biochemistry quiz.
Michaelis-Menten Kinetics: Models reaction velocity as Vmax times substrate over Km plus substrate, describing enzyme saturation. Noncompetitive Inhibition: An inhibitor binds elsewhere on the enzyme, lowering Vmax without changing Km. Read both side by side and note what each one explains.
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Noncompetitive Inhibition and explain the difference aloud. Finally, take the Biomolecules & Biochemistry quiz and come back to this page for any question you miss.
An inhibitor binds elsewhere on the enzyme, lowering Vmax without changing Km.
⚗️ Biomolecules & BiochemistryAn inhibitor resembling the substrate binds the active site and can be overcome by more substrate.
⚗️ Biomolecules & BiochemistryBinding of a ligand to one subunit alters affinity at others, giving haemoglobin its sigmoidal oxygen curve.
⚗️ Biomolecules & BiochemistryTemperature, pH, substrate and enzyme concentration, and inhibitors all alter the rate of enzyme-catalysed reactions.
⚗️ Biomolecules & Biochemistry