DP Biology (first assessment 2025)

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Question 22M.2.SL.TZ2.b.i

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Date May 2022 Marks available [Maximum mark: 2] Reference code 22M.2.SL.TZ2.b.i
Level SL Paper 2 Time zone TZ2
Command term Distinguish Question number b.i Adapted from N/A
b.i.
[Maximum mark: 2]
22M.2.SL.TZ2.b.i

Distinguish between the structure of chromosomes in prokaryotes and eukaryotes.

[2]

Markscheme
  1. prokaryotes (usually) have one chromosome while eukaryotes have numerous chromosomes;
  2. prokaryotes have a circular chromosome while eukaryotes have linear ones;
  3. eukaryotes’ chromosomes are associated with histones/proteins but prokaryotes/Eubacteria have naked DNA vs eukaryote DNA associated to proteins/histones;

Accept only differences.

Differentiating terms expected;

Examiners report

This question led to a large number of correct answers. Some answers focused on the difference between prokaryotes and eukaryotes instead of their chromosomes.

Syllabus sections