Where does the primary photochemical reaction occur in choroplast or where does the light reactions of photosynthesis take place or Light reaction takes place in

Options

A. Stroma
B. Periplast cavity
C. Quantosomes
D. Inner membrane of chloroplast

Answer

**Step-by-Step Solution:**

1. **Understanding Photosynthesis**: Photosynthesis occurs in two main stages: the light reactions (or light-dependent reactions) and the dark reactions (or light-independent reactions).

2. **Location of Light Reactions**: The light reactions of photosynthesis primarily take place in the thylakoid membranes of the chloroplasts.

3. **Role of Thylakoids**: Thylakoids contain chlorophyll and other pigments that absorb light energy. This energy is used to split water molecules, releasing oxygen and generating ATP and NADPH.

4. **Quantosomes**: Within the thylakoid membranes, there are structures called quantosomes. These are essential for the light reactions as they contain the photosystems and other components necessary for capturing light energy.

5. **Conclusion**: Therefore, the primary photochemical reaction, which includes the light reactions of photosynthesis, occurs in the quantosomes located in the thylakoid membranes of the chloroplasts.

**Final Answer**: The light reactions of photosynthesis take place in the quantosomes, which are found in the thylakoid membranes of chloroplasts.

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