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C1.1.7—Relationships between structure and function

Enzyme function depends on active-site structure, chemical attraction and tertiary shape that allow only suitable substrates to bind effectively during catalysis.

Syllabus
First assessment 2025
Objective
C1.1.7
Level
HL

Exam analysis

Chance of appearing1%of analysed past papers
Latest appearanceMay 2013
Most common paperPaper2
Typical marks2

Common command terms

  • Explain

Recent exam appearances

May 2013Paper2 ["HL"] · TZ24(b)[ 2 ]C1.1.7—Relationships between structure and function
Practice this objective

Coverage 2013–2013 · Updated 15 Jul 2026

Concept essentials

  • Active-site structure determines which substrates can bind.
  • Specificity depends on shape and chemical properties.
  • Denaturation changes tertiary structure and active-site function.
  • Enzyme-substrate complex formation depends on structural compatibility.
ConceptIB Biology HL