The assimilatory power produced during light released in the

Options

A. ATP , NADPH ` + H^(+)`
B. `NAD^(+)`
C. NADP
D. ATP & NADH

Answer

**Step-by-Step Solution:**

1. **Understanding Photosynthesis**: Photosynthesis is the process by which plants convert light energy into chemical energy, producing their own food. It consists of two main stages: the light reactions and the dark reactions (Calvin cycle).

2. **Light Reactions**: These occur in the thylakoid membranes of the chloroplasts and involve two photosystems: Photosystem I (PSI) and Photosystem II (PSII).

3. **Photolysis of Water**: In the light reactions, water molecules are split (photolysis) to release electrons, protons (H+), and oxygen. The electrons released from water are transferred to PSII.

4. **Electron Transport Chain**: The electrons move through an electron transport chain, leading to the generation of a proton gradient across the thylakoid membrane.

5. **Formation of ATP**: The energy from the electron transport chain is used to convert ADP and inorganic phosphate (Pi) into ATP through a process called photophosphorylation.

6. **Formation of NADPH**: The electrons eventually reach PSI, where they are re-energized by light and used to reduce NADP+ to NADPH. This process also involves the addition of protons (H+).

7. **Release of Assimilatory Power**: The assimilatory power produced during the light reactions is primarily in the form of ATP, NADPH, and hydrogen ions (H+). These molecules are essential for the subsequent dark reactions.

8. **Dark Reactions**: The ATP and NADPH produced in the light reactions are then utilized in the dark reactions (Calvin cycle) to fix carbon dioxide into organic molecules.

**Final Answer**: The assimilatory power produced during the light reactions is released in the form of ATP, NADPH, and hydrogen ions (H+).

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