Activator of Rubisco, catalase, alcohol dehydrogenase and PEP case are respectively.

Options

A. Mg,Zn,Zn,Mg
B. Mg,Fe,Fe,Mg
C. Mg,Fe,Zn,Mg
D. Mg,Zn,Fe,Mg

Answer

To answer the question regarding the activators of the enzymes Rubisco, catalase, alcohol dehydrogenase, and PEP case, we will go through each enzyme step by step.

### Step 1: Understand the Function of Each Enzyme
1. **Rubisco**: This enzyme catalyzes the process of carbon fixation in plants, which is essential for photosynthesis.
2. **Catalase**: This enzyme helps in the decomposition of hydrogen peroxide into water and oxygen, protecting cells from oxidative damage.
3. **Alcohol Dehydrogenase**: This enzyme is involved in the reduction of aldehydes and ketones to form primary and secondary alcohols.
4. **PEP Case (Phosphoenolpyruvate Carboxylase)**: This enzyme plays a crucial role in C4 metabolism, particularly in plants and some bacteria.

### Step 2: Identify the Activators for Each Enzyme
1. **Activator of Rubisco**: The activator for Rubisco is **Magnesium (Mg²⁺)**. Magnesium ions are essential for the enzyme's activity.
2. **Activator of Catalase**: The activator for catalase is **Iron (Fe²⁺)**. Iron is a key component that facilitates the enzyme's function in breaking down hydrogen peroxide.
3. **Activator of Alcohol Dehydrogenase**: The activator for alcohol dehydrogenase is **Zinc (Zn²⁺)**. Zinc ions play a vital role in the enzyme's catalytic activity.
4. **Activator of PEP Case**: The activator for PEP Case is also **Magnesium (Mg²⁺)**. Like Rubisco, magnesium is crucial for the activity of this enzyme.

### Step 3: Compile the Activators
Now that we have identified the activators for each enzyme, we can summarize them as follows:
- **Rubisco**: Magnesium
- **Catalase**: Iron
- **Alcohol Dehydrogenase**: Zinc
- **PEP Case**: Magnesium

### Final Answer
The activators of Rubisco, catalase, alcohol dehydrogenase, and PEP case are respectively:
- **Rubisco**: Magnesium
- **Catalase**: Iron
- **Alcohol Dehydrogenase**: Zinc
- **PEP Case**: Magnesium

Thus, the correct option is:
- **Magnesium, Iron, Zinc, Magnesium**

---