From which molecule does ferrodoxin pick up the electrons? In which photo system does it participate?

Explanation

### Step-by-Step Solution:

1. **Understanding Ferredoxin**:
- Ferredoxin is an electron carrier protein that plays a crucial role in the photosynthetic process. It contains iron-sulfur clusters that facilitate the transfer of electrons.

2. **Photosynthesis Overview**:
- Photosynthesis occurs in two main stages: the light reactions and the dark reactions. The light reactions involve the absorption of light by pigments and the transport of electrons, leading to the formation of energy carriers like ATP and NADPH.

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