DP Biology (first assessment 2025)

Test builder »

Question 19M.1A.SL.TZ2.1

Select a Test
Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1A.SL.TZ2.1
Level SL Paper 1A Time zone TZ2
Command term Identify Question number 1 Adapted from N/A
1.
[Maximum mark: 1]
19M.1A.SL.TZ2.1

Which structures are found only in prokaryotic cells?

A. Ribosomes

B. Pili

C. Cell walls

D. Flagella

[1]

Markscheme

B

Examiners report

This was not an easy first question. In the SL Bio guide section 1.2 the guidance states that pili and flagella should be shown on diagrams of prokaryotic cells. There is a note that cell walls can be found on both but does not mention that flagella can also be found on eukaryotic cells. An example where flagella can be found is in sperm cell tails. It is obvious from the answers that candidates did not know this, as many answered question D instead of B.

Syllabus sections