In chloroplast, the site for initial photochemical reaction is

Options

A. Intermembrane space
B. Inner member are of chloroplast
C. Thyllakoid membrane
D. Stroma

Answer

To solve the question about the site of the initial photochemical reaction in chloroplasts, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the specific location within the chloroplast where the initial photochemical reactions occur. These reactions are also known as light reactions.

2. **Identify the Key Terms**: The key terms in the question are "chloroplast," "initial photochemical reaction," and "site." We need to focus on the chloroplast structure and its components.

3. **Recall Chloroplast Structure**: Chloroplasts have several components, including the outer membrane, inner membrane, thylakoids, and stroma. The thylakoids are organized into stacks called grana.

4. **Know the Function of Thylakoids**: The light reactions of photosynthesis occur in the thylakoid membranes. During these reactions, light energy is captured and used to produce ATP and NADPH, and water is split in a process called photolysis.

5. **Eliminate Incorrect Options**:
- **Intermembrane space**: This is the space between the outer and inner membranes of the chloroplast and does not participate in the light reactions.
- **Inner membrane**: This membrane surrounds the stroma but does not carry out the light reactions.
- **Stroma**: This is the fluid-filled space inside the chloroplast where the Calvin cycle (light-independent reactions) occurs, but not where the initial photochemical reactions take place.

6. **Conclude the Correct Answer**: Since the light reactions occur in the thylakoid membranes, the correct answer to the question is the **thylakoid membrane**.

### Final Answer:
The site for the initial photochemical reaction in chloroplasts is the **thylakoid membrane**.

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