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C1.3.10 (HL)—Advantages of pigment arrays

Pigment arrays improve photosynthesis by combining chlorophyll and accessory pigments so more wavelengths can be captured efficiently, connecting the mechanism to observable photosynthesis evidence.

Syllabus
First assessment 2025
Objective
C1.3.10
Level
HL

Concept essentials

  • Different pigments absorb different parts of the visible spectrum.
  • Accessory pigments transfer captured energy toward a reaction centre.
  • Pigment arrays increase the range of usable light.
  • Photosystems depend on organized light harvesting rather than isolated pigment molecules.
ConceptIB Biology HL