Protein coded by which of the following genes controls the cotton bollworms?

Options

A. Cry I Ac
B. Cry II Ab
C. Cry I Ab
D. Both (1) and (2)

Answer

To solve the question regarding which proteins encoded by specific genes control the cotton bollworms, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Context**: The question asks about proteins that control cotton bollworms, which are pests affecting cotton crops.

2. **Understand the Source of the Proteins**: The proteins in question are derived from genes known as "cry genes" that are isolated from the bacterium *Bacillus thuringiensis* (Bt).

3. **Recognize the Function of Cry Genes**: These cry genes encode for proteins that produce a toxin (Bt toxin) when expressed in plants. This toxin is effective against certain insects, including cotton bollworms.

4. **List the Relevant Cry Genes**: The options provided in the question include:
- Cry 1 AC
- Cry 2 AB
- Cry 1 AB
- Both 1 and 2

5. **Determine the Specificity of Each Cry Gene**:
- **Cry 1 AC**: Effective against cotton bollworms.
- **Cry 2 AB**: Also effective against cotton bollworms.
- **Cry 1 AB**: Effective against corn borers, not cotton bollworms.

6. **Conclude the Answer**: Since both Cry 1 AC and Cry 2 AB are effective against cotton bollworms, the correct answer is that both Cry 1 AC and Cry 2 AB control the cotton bollworms. Therefore, the answer is "both 1 and 2".

### Final Answer:
The proteins encoded by the genes Cry 1 AC and Cry 2 AB control the cotton bollworms.

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