The lamellae, known as grana are the centres of ......... reaction of photosynthesis.

Explanation

To answer the question, "The lamellae, known as grana are the centres of ......... reaction of photosynthesis," we can follow these steps:

### Step-by-Step Solution:

1. **Understand Photosynthesis**: Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose. It occurs in two main stages: light-dependent reactions and light-independent reactions.

2. **Identify the Components of Photosynthesis**:
- **Light-dependent reactions**: These occur in the thylakoid membranes of the chloroplasts (which are organized into structures called grana). They require light to produce ATP and NADPH.
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