Skip to main content
O-LevelBiologyTransport in Humans5090/12 · Oct/Nov 2020 · Q191 Mark

The diagram shows a dialysis machine. Which substance would not be present in a sample of the dialysis fluid taken from point X?

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.

Aglucose molecules
Bsalt ions
Cplasma proteins
Durea molecules

✓ Correct answer

C: plasma proteins

Practise more questions on this topic

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.

Sign up free →

About this question

Topic
Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, Oct/Nov 2020 Paper 1 Variant 2, question 19.

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

Related Biology questions

© 2026 Oracle Prep