Featured Article Quiz #114
Enzyme kinetics
#1 Which statement about enzyme kinetics is correct?
It studies how fast enzyme-catalysed reactions proceed and how changing conditions affect the rate.
It only studies equilibrium positions and not reaction rates.
It assumes enzymes change the equilibrium between substrates and products.
#2 In saturation kinetics, what happens to reaction rate at high substrate concentration?
The rate levels off at a maximum because enzyme active sites become saturated.
The rate increases roughly in proportion to substrate concentration without limit.
The rate becomes zero once substrate concentration is high.
#3 What does KM represent in the Michaelis–Menten context?
The substrate concentration where the reaction speed is half the maximum (Vmax).
The substrate concentration at which the enzyme–substrate complex is fully formed.
The rate constant for the zero-order step when the enzyme is not saturated.