๐Ÿงฌap biology review

Photosystem II

Written by the Fiveable Content Team โ€ข Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated August 2025

Definition

Photosystem II is the first protein complex in the light-dependent reactions of oxygenic photosynthesis. It captures photons and uses the energy to extract electrons from water molecules.

AP course connection

Topic 3.5: 3.5 Cellular Respiration

Unit 3

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