O-LevelBiologyTransport in Humans5090/12 · Oct/Nov 2023 · Q221 Mark

The graph shows the antibody concentration in a child's blood over a period of time. It shows what happens to the antibody concentration after a child is vaccinated against a particular disease and after the child is infected by the pathogen for that disease. [Figure 22.1] Based on the graph, which statement is correct?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

AMemory cells have disappeared from the child's blood by 3.

BMemory cells were in the child's blood at 2.

CMemory cells were in the child's blood before 1.

DPassive immunity was attained at 4.

✓ Correct answer

B: Memory cells were in the child's blood at 2.

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

Topic: Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2023 Paper 1 Variant 2, question 22.

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