Which of the following is main enzyme of plasma membrane :-

Options

A. TPP ase
B. ATP ase
C. Peptidyl transferase
D. Catalases

Answer

To determine the main enzyme of the plasma membrane, we will analyze the given options step by step.

### Step 1: Understand the Question
The question asks for the main enzyme present in the plasma membrane. We need to evaluate the options provided to identify which one fits this criterion.

### Step 2: Evaluate the Options
1. **TPPase (Tripolyphosphatase)**: This enzyme is not recognized as the main enzyme of the plasma membrane. It does not play a significant role in the functions of the plasma membrane.

2. **ATPase**: This is a class of enzymes that catalyze the hydrolysis of ATP (adenosine triphosphate) to ADP (adenosine diphosphate) and inorganic phosphate. This reaction is crucial for energy release, which is essential for various cellular processes, including those occurring at the plasma membrane. Therefore, ATPase is considered the main enzyme of the plasma membrane.

3. **Peptidyl Transferase**: This enzyme is involved in protein synthesis and is primarily found in the ribosomes, not in the plasma membrane. Thus, it is not the correct answer.

4. **Catalysis**: This term refers to the process of accelerating a chemical reaction, but it is not an enzyme itself. Therefore, it cannot be considered the main enzyme of the plasma membrane.

### Step 3: Conclusion
After evaluating all the options, the correct answer is **ATPase**, as it is the main enzyme associated with the plasma membrane, facilitating energy release necessary for various cellular functions.

### Final Answer
The main enzyme of the plasma membrane is **ATPase**.

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