Photosynthetic pigments found in the chloroplasts occur in

Options

A. thylakoid membranes
B. plastoglobules
C. matrix
D. chloroplast envelope

Explanation

To answer the question "Photosynthetic pigments found in the chloroplasts occur in," we need to analyze the options provided and understand where these pigments are located within the chloroplasts.

### Step-by-Step Solution:

1. **Understanding Photosynthetic Pigments**:
- Photosynthetic pigments are molecules that absorb light energy for photosynthesis. The primary pigments involved are chlorophyll a, chlorophyll b, and carotenoids.

2. **Identifying the Structure of Chloroplasts**:
- Chloroplasts are organelles found in plant cells and are responsible for photosynthesis. They contain various structures, including the outer membrane, inner membrane, stroma, and thylakoids.

3. **Analyzing the Options**:
- **a. Thylakoid membranes**: These are membrane-bound structures within the chloroplasts that contain chlorophyll and other pigments. They are arranged in stacks known as grana.
- **b. Plastoglobules**: These are lipid droplets found in chloroplasts but do not contain significant amounts of photosynthetic pigments.
- **c. Matrix**: This refers to the stroma of the chloroplast, which is the fluid-filled space surrounding the thylakoids. While it contains enzymes for the Calvin cycle, it is not where the pigments are primarily located.
- **d. Chloroplast envelope**: This is the double membrane surrounding the chloroplast, which does not contain photosynthetic pigments.

4. **Conclusion**:
- The correct answer is **a. thylakoid membranes**, as this is where the photosynthetic pigments are located and where the light-dependent reactions of photosynthesis occur.

### Final Answer:
Photosynthetic pigments found in the chloroplasts occur in **thylakoid membranes**.