Select the incorrect statement , among the following

Options

A. Haemoglobin is soluble in water
B. `alpha`-Keratin is soluble in water
C. Cellulose is a polymer of glucose
D. Chlorophyll is responsible for the synthesis of carbohydrates in plants.

Explanation

To solve the question of selecting the incorrect statement among the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement 1: Hemoglobin is soluble in water.**
- Hemoglobin is a globular protein that is indeed soluble in water. It plays a crucial role in transporting oxygen in the blood.
- **Conclusion:** This statement is **correct**.

2. **Statement 2: Alpha keratin is soluble in water.**
- Alpha keratin is a fibrous protein that is a major component of hair, nails, and the outer layer of skin. It is known to be **insoluble** in water.
- **Conclusion:** This statement is **incorrect**.

3. **Statement 3: Cellulose is a polymer of glucose.**
- Cellulose is a polysaccharide that consists of long chains of glucose units linked together. It is a major component of plant cell walls.
- **Conclusion:** This statement is **correct**.

4. **Statement 4: Chlorophyll is responsible for the synthesis of carbohydrates in plants.**
- Chlorophyll is the pigment that allows plants to absorb light energy for photosynthesis. While it plays a role in the process, it is not directly responsible for the synthesis of carbohydrates; rather, it facilitates the process of photosynthesis, during which carbohydrates are produced.
- **Conclusion:** This statement is somewhat misleading but can be considered **correct** in the context of its role in photosynthesis.

### Final Answer:
The **incorrect statement** among the options provided is:
- **Alpha keratin is soluble in water.**