Learning objective
A1.2.2—Components of a nucleotide
Nucleotides are built from a phosphate group, a pentose sugar, and a nitrogenous base, with DNA and RNA differing in sugar and bases.
- Syllabus
- First assessment 2025
- Objective
- A1.2.2
- Level
- SL
Concept essentials
- Components of a nucleotide 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.
