GLUT - 4 is

Options

A. a protein which enables glucose transport in cells
B. a carbohydrate which enables glucose transport in cells
C. a protein which enables glucose transport .
D. a lipid which allows transport of hormone.

Answer

To solve the question regarding GLUT-4, we need to analyze the options provided and understand the function and nature of GLUT-4.

### Step-by-Step Solution:

1. **Understanding GLUT-4**:
- GLUT-4 stands for Glucose Transporter Type 4. It is a specific type of protein that facilitates the transport of glucose into cells.

2. **Analyzing the Options**:
- **Option A**: "a protein which enables glucose transport in the cells"
- This option accurately describes GLUT-4 as it is indeed a protein that helps transport glucose into cells.
- **Option B**: "a carbohydrate which enables glucose transport in the cells"
- This is incorrect because GLUT-4 is not a carbohydrate; it is a protein.
- **Option C**: "a protein which enables glucose transport"
- While this is partially correct, it lacks specificity about where the glucose is being transported (i.e., into the cells).
- **Option D**: "a lipid which allows transport of hormone"
- This is incorrect as GLUT-4 is not a lipid and does not transport hormones.

3. **Conclusion**:
- The best option that accurately describes GLUT-4 is **Option A**: "a protein which enables glucose transport in the cells".

### Final Answer:
**GLUT-4 is a protein which enables glucose transport in the cells. (Option A)**

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