Which of the following cry gene codes for a protein which can control the cotton bollworms?

Options

A. cry l Ac
B. Cry II Ab
C. Cry I Ab
D. cry II Ac

Answer

To answer the question regarding which cry gene codes for a protein that can control cotton bollworms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Problem**: The question asks for the specific cry gene that codes for a protein effective against cotton bollworms. Cotton bollworms are pests that damage cotton plants.

2. **Identifying the Source**: The cry genes are derived from the bacterium *Bacillus thuringiensis* (Bt). This bacterium produces proteins that are toxic to certain insects.

3. **Recognizing the Relevant Proteins**: The proteins produced by the cry genes that are effective against cotton bollworms are known as Bt toxins.

4. **Identifying Specific Cry Genes**: The cry genes that are known to control cotton bollworms include:
- **Cry1Ac**
- **Cry2Ab**

5. **Conclusion**: Since both Cry1Ac and Cry2Ab have been identified as effective against cotton bollworms, the answer to the question is that both of these cry genes code for proteins that can control cotton bollworms.

### Final Answer:
The cry genes that code for proteins which can control the cotton bollworms are **Cry1Ac and Cry2Ab**.

---