EduNinja
Learning objective

A1.2.7—Differences between DNA and RNA

DNA and RNA differ in sugar, bases, strand structure, and usual length, giving each nucleic acid distinct roles in cells.

Syllabus
First assessment 2025
Objective
A1.2.7
Level
SL

Concept essentials

  • Differences between DNA and RNA should be described using precise molecular vocabulary.
  • Structure and information must be kept separate: backbones provide continuity while bases carry sequence meaning.
  • Exam answers should match the command term and avoid adding unsupported extra claims.

Exam analysis

Question evidence linked specifically to this learning objective.

Chance of appearing6%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper1
Typical marks1–2

Common command terms

  • Identify
  • State
  • Distinguish
  • Determine

Exam question appearances

November 2025Paper2 SL · TZ32(c)[ 2 ]A1.2.7—Differences between DNA and RNA
May 2025Paper2 SL · TZ15(b)[ 2 ]A1.2.7—Differences between DNA and RNA
November 2024Paper1 SL · TZ111[ 1 ]A1.2.7—Differences between DNA and RNA
May 2019Paper3 SL · TZ22(b)[ 2 ]A1.2.7—Differences between DNA and RNA
May 2018Paper2 SL · TZ12(c)[ 2 ]A1.2.7—Differences between DNA and RNA

Coverage 2010–2025 · Updated 14 Jul 2026

Focused stepA1.2.7—Differences between DNA and RNA