Section 1 of the e-exam is multiple choice, with 10 questions from 2026. Read every option before you choose: the wrong ones are built from common slips.
Section 1
10 multiple-choice questions from 2026 (15 in 2024 and 2025)
Options
One best answer
Our checks
Two timed checks of 18 four-option questions in 30 minutes
What the questions test
Ideas from all four topics, often in a short scenario.
Reading data: a table, a graph, an electropherogram, a phylogenetic tree or a feedback loop.
Short calculations: a percentage change, an allele frequency or a surface area to volume ratio.
Try 2 questions
Question 1
Peak sizes (bp) on the electropherograms at three STR loci
Sample
Locus 1 peaks (bp)
Locus 2 peaks (bp)
Locus 3 peaks (bp)
Crime scene
128 and 136
160 and 172
204 and 216
Suspect 1
128 and 136
160 and 168
204 and 216
Suspect 2
128 and 136
160 and 172
204 and 216
Suspect 3
124 and 136
160 and 172
204 and 216
Suspect 4
128 and 136
160 and 172
208 and 216
Forensic scientists in Adelaide profiled blood from a crime scene and four suspects at three short tandem repeat (STR) loci. Each peak on an electropherogram is one allele; the table lists the size of each peak. Which suspect's profile matches the crime scene sample?
Question 2
Oxygen and ethanol in a sealed flask of yeast and glucose solution over 80 minutes
Time (min)
Oxygen (% of starting level)
Ethanol (mmol L⁻¹)
0
100
0
20
52
0
40
3
0
60
0
1.4
80
0
2.9
A student seals yeast in a flask of glucose solution at 30 °C and measures the oxygen and ethanol in the solution every 20 minutes. The table shows the results. Which statement best explains them?