◈ Oracle PrepSign Up Free
O-LevelBiologyRespiration5090/11 · Oct/Nov 2021 · Q171 Mark

What are features of the alveoli?

Alined by cilia: ✓, lined with moisture: ✗, walls are one cell thick: ✓
Blined by cilia: ✗, lined with moisture: ✓, walls are one cell thick: ✗
Clined by cilia: ✓, lined with moisture: ✗, walls are one cell thick: ✗
Dlined by cilia: ✗, lined with moisture: ✓, walls are one cell thick: ✓

✓ Correct answer

D: lined by cilia: ✗, lined with moisture: ✓, walls are one cell thick: ✓

Practise more questions on this topic

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

Sign up free →

About this question

Topic
Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, Oct/Nov 2021 Paper 1 Variant 1, question 17.

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

RespirationMay/June 20141m

Yeast is used in alcohol production. Under which conditions will yeast produce most alcohol?

RespirationMay/June 201410m

Outline the role of a named type of microorganism in the production of each of the following products. bread type of …

RespirationMay/June 201410m

Explain the fact that humans breathe while plants do not.

Human NutritionMay/June 20151m

What is an example of assimilation?

Human NutritionMay/June 20151m

What are the basic units from which glycogen is synthesised?

Human NutritionMay/June 20151m

A food is known to contain protein, but no reducing sugar. When this food is tested with biuret solution and Benedict…

← Browse all past-paper questions

© 2026 Oracle Prep