DP Chemistry (last assessment 2024)
Question 19M.3.hl.TZ1.12a(i)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.hl.TZ1.12a(i) |
| Level | hl | Paper | 3 | Time zone | TZ1 |
| Command term | Sketch | Question number | a(i) | Adapted from | N/A |
a(i).
[Maximum mark: 1]
19M.3.hl.TZ1.12a(i)
Alcohol dehydrogenase (ADH) catalyses the oxidation of methanol. The products of oxidation, methanal and methanoic acid, are toxic.
(a(i))
A Michaelis–Menten plot for an enzyme-catalysed reaction is shown.
Sketch a curve to show the effect of a competitive inhibitor.
[1]
Markscheme
[✔]
Note: Line must start at origin, to the right of original line and bending toward the same Vmax.
Examiners report
Most candidates correctly sketched a curve to show the effect of a competitive inhibitor on a Michaelis-Menten plot.
