Chloroplast stroma of higher plants contains

Options

A. ribosomes
B. chlorophyll
C. light-independent reaction enzymes
D. light - dependent reaction enzymes

Explanation

To answer the question regarding what the stroma of chloroplasts in higher plants contains, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chloroplast Structure**:
- Chloroplasts are organelles found in plant cells that are responsible for photosynthesis. They have an outer membrane and an inner membrane. Inside the inner membrane, there are structures called thylakoids, which are stacked to form grana.

2. **Defining Stroma**:
- The stroma is the fluid-filled space surrounding the thylakoids within the chloroplast. It contains various components necessary for photosynthesis.

3. **Identifying Key Components of the Stroma**:
- The stroma contains enzymes that are crucial for the light-independent reactions (also known as the Calvin cycle) of photosynthesis. These reactions utilize ATP and NADPH produced in the light-dependent reactions.

4. **Considering Other Components**:
- In addition to enzymes, the stroma also contains ribosomes, specifically 70S ribosomes, which are involved in protein synthesis within the chloroplast.

5. **Excluding Other Options**:
- Chlorophyll is not found in the stroma; it is located in the thylakoid membranes where light-dependent reactions occur. The light-dependent reaction enzymes are also located in the thylakoid membranes, not in the stroma.

6. **Conclusion**:
- Therefore, the stroma of chloroplasts in higher plants contains enzymes for light-independent reactions and ribosomes. The primary focus for the question is the presence of light-independent reaction enzymes.

### Final Answer:
The stroma of chloroplasts in higher plants contains enzymes for light-independent reactions (dark reactions) and 70S ribosomes.

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