The components of PS-I are located on the

Options

A. stroma
B. stroma thylakoid
C. gramum thylkoid
D. outer surface of stomal and grana thylakoid

Explanation

**Step-by-Step Solution:**

1. **Understanding Photosystems**: Photosystems are complexes of proteins and pigments that play a crucial role in photosynthesis. There are two main types: Photosystem I (PS-I) and Photosystem II (PS-II).

2. **Identifying PS-I Location**: The question specifically asks about the location of the components of Photosystem I.

3. **Wavelength Characteristics**: PS-I absorbs light primarily at a wavelength of 700 nanometers, while PS-II absorbs light at 618 nanometers. This characteristic helps differentiate the two systems.

4. **Location in Chloroplasts**: The components of PS-I are located on the outer surface of the stroma and the thylakoid membranes (granathilocort). The stroma is the fluid-filled space surrounding the thylakoids in chloroplasts.

5. **Conclusion**: Therefore, the components of Photosystem I are found on the outer surface of the stroma and the thylakoid membranes (granathilocort), which are essential for the process of photosynthesis.

**Final Answer**: The components of PS-I are located on the outer surface of the stroma and the thylakoid membranes (granathilocort).

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