Which of the following will be an enzyme?

Options

A. maltase
B. lactase
C. `MnO_(2)`
D. co-enzyme A

Answer

To determine which of the following options is an enzyme, we will analyze each option based on the definition and characteristics of enzymes.

### Step-by-Step Solution:

1. **Understanding Enzymes**: Enzymes are biological catalysts that speed up chemical reactions in living organisms. They are typically proteins and are specific to the reactions they catalyze.

2. **Analyzing the Options**:
- **Option 1: Maltase**
- Maltase is an enzyme that catalyzes the hydrolysis of maltose into glucose. Since it facilitates a biological reaction, it qualifies as an enzyme.
- **Option 2: Lactase**
- Lactase is another enzyme that breaks down lactose (the sugar found in milk) into glucose and galactose. As it also catalyzes a biological reaction, it is classified as an enzyme.
- **Option 3: MnO2 (Manganese Dioxide)**
- MnO2 is an inorganic compound that acts as a catalyst in chemical reactions, such as the decomposition of hydrogen peroxide. However, it is not a biological catalyst and therefore is not classified as an enzyme.
- **Option 4: Coenzyme A**
- Coenzyme A is a vital coenzyme involved in various biochemical reactions, including the TCA cycle (Krebs cycle). While it assists enzymes, it is not an enzyme itself. However, it is often considered an essential component in enzymatic reactions.

3. **Conclusion**:
- The enzymes among the options are **Maltase** and **Lactase**. Coenzyme A plays a crucial role in enzymatic reactions but is not classified as an enzyme itself. MnO2 is not an enzyme.

### Final Answer:
The enzymes from the given options are **Maltase** and **Lactase**. Coenzyme A is important in enzymatic processes but is not an enzyme itself. MnO2 is not an enzyme.

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