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B2.1.9—Glycoproteins and glycolipids

Glycoproteins and glycolipids carry external carbohydrate chains that form the glycocalyx for recognition, adhesion, and signalling interactions; These outward-facing carbohydrates make the cell surface chemically identifiable to other cells.

Syllabus
First assessment 2025
Objective
B2.1.9
Level
SL

Exam analysis

Chance of appearing1%of analysed past papers
Latest appearanceMay 2025
Most common paperPaper1A
Typical marks1

Common command terms

  • Identify

Recent exam appearances

May 2025Paper1A ["SL"] · TZ19[ 1 ]B2.1.9—Glycoproteins and glycolipids
Practice this objective

Coverage 2025–2025 · Updated 15 Jul 2026

Concept essentials

  • Glycoproteins have carbohydrate chains attached to membrane proteins.
  • Glycolipids have carbohydrate chains attached to membrane lipids.
  • Carbohydrate chains are exposed on the extracellular membrane surface.
  • The glycocalyx supports recognition, adhesion, and cell signalling.
ConceptIB Biology SL