Fill in the blanks:
Dark reaction takes place in ____________ of chloroplast.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Chloroplast Structure**: Chloroplasts are the organelles in plant cells where photosynthesis occurs. They contain two main parts: the thylakoid membranes and the stroma.

2. **Identifying the Types of Reactions**: Photosynthesis consists of two main types of reactions: light reactions and dark reactions. Light reactions occur in the thylakoid membranes and require light, while dark reactions do not require light.

3. **Locating the Dark Reactions**: The dark reactions, also known as the Calvin cycle, take place in the stroma of the chloroplast. The stroma is the fluid-filled space surrounding the thylakoids.

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