A-LevelBiologyEnzymes9700/12 · Oct/Nov 2025 · Q141 Mark

How is the Michaelis–Menten constant (Kₘ) used?

Ato determine the number of collisions between the enzyme and substrate

Bto compare the affinity of enzymes for their substrates

Cto find the maximum velocity of an enzyme (Vₘₐₓ)

Dto find the optimum rate of reaction

✓ Correct answer

B: to compare the affinity of enzymes for their substrates

Oracle Prep sorts past-paper questions by topic, so you can drill Enzymes and see which topics are most likely to come up next.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

Two pairs of students each counted the number of bubbles of oxygen given off in an experiment investigating the effec…

When investigating the rate of reaction of the enzyme lipase on the hydrolysis of triglycerides, the pH must be maint…

The drug ritonavir is sometimes used in the treatment of HIV/AIDS. Ritonavir consists of three amino acids and is a c…

Some parts of a typical human chromosome are more numerous than others. Which parts are listed in order from the most…

Why does an air bubble in a xylem vessel element stop the flow of water? 1 loss of adhesion 2 loss of cohesion 3 coll…

Which feature of some xerophytic leaves reduces the rate of transpiration by decreasing the water potential gradient …