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A1.2.5—RNA as a polymer

RNA is a usually single-stranded polynucleotide containing ribose and uracil, with different RNA forms supporting protein synthesis in cells in IB Biology exam contexts.

Syllabus
First assessment 2025
Objective
A1.2.5
Level
HL

Exam analysis

Chance of appearing1%of analysed past papers
Latest appearanceNovember 2021
Most common paperPaper2
Typical marks4

Common command terms

  • Draw

Recent exam appearances

November 2021Paper2 HL · TZ06(a)[ 4 ]A1.2.5—RNA as a polymer
Practice this objective

Coverage 2021–2021 · Updated 14 Jul 2026

Concept essentials

  • RNA as a polymer 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.
ConceptIB Biology HL