The movement of electron from chlorophyll molecules to NADP occur in

Options

A. photosystem I
B. photophosphorylation
C. photosystem II
D. photorespiration

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question asks about the movement of electrons from chlorophyll molecules to NADP (Nicotinamide adenine dinucleotide phosphate) during photosynthesis.

2. **Identifying the Process**: This electron transfer occurs during a specific phase of photosynthesis known as the light-dependent reactions, which take place in the thylakoid membranes of chloroplasts.

3. **Role of Chlorophyll**: Chlorophyll is the pigment responsible for capturing light energy. When chlorophyll absorbs light, it becomes excited and releases an electron.

4. **Electron Transport Chain**: The excited electron from chlorophyll is transferred to a primary electron acceptor. From there, it moves through a series of proteins embedded in the thylakoid membrane, known as the electron transport chain.

5. **Formation of NADPH**: As the electron moves through the electron transport chain, it eventually reaches NADP, where it combines with protons (H+) to form NADPH. This process is part of photophosphorylation.

6. **Energy Currency**: The NADPH produced, along with ATP generated during the light reactions, serves as the energy currency for the subsequent light-independent reactions (Calvin cycle) of photosynthesis.

7. **Conclusion**: Therefore, the movement of electrons from chlorophyll molecules to NADP occurs during the process of photophosphorylation in the light-dependent reactions of photosynthesis.

**Final Answer**: The movement of electrons from chlorophyll molecules to NADP occurs in photophosphorylation.

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