Which of the following set is having correct statements for enzyme catalyst?
1. Each enzyme is specific for a given reaction
2. the enzyme activity is maximum at optimum pH
3. The enzymatic activity is increased in presence of certain substances called co - enzymes
4. The favourable temperature range of enzyme activity is between `50-60""^(@)C`

Options

A. 1, 3
B. 2, 3
C. 1, 2, 3
D. 1, 2, 3, 4

Answer

To determine which statements about enzyme catalysts are correct, we will analyze each statement one by one.

1. **Statement 1: Each enzyme is specific for a given reaction.**
- Enzymes are biological catalysts that are highly specific for their substrates. Each enzyme catalyzes a specific reaction or a set of closely related reactions. For example, lactase specifically hydrolyzes lactose into glucose and galactose. Therefore, this statement is **true**.

2. **Statement 2: The enzyme activity is maximum at optimum pH.**
- Each enzyme has an optimum pH at which its activity is maximized. Deviations from this pH can lead to decreased activity or denaturation of the enzyme. Thus, this statement is also **true**.

3. **Statement 3: The enzymatic activity is increased in the presence of certain substances called co-enzymes.**
- Coenzymes are non-protein molecules that assist enzymes in catalyzing reactions. They can enhance the activity of enzymes and are essential for the proper functioning of many enzymes. Therefore, this statement is **true**.

4. **Statement 4: The favorable temperature range of enzyme activity is between 50-60°C.**
- Most enzymes in the human body (and many other organisms) have an optimal temperature around 37°C. While some enzymes from thermophilic organisms can function at higher temperatures, the general statement that enzyme activity is favorable at 50-60°C is **incorrect** for most enzymes.

Based on the analysis:
- Statements 1, 2, and 3 are correct.
- Statement 4 is incorrect.

Thus, the correct set of statements for enzyme catalysts is **1, 2, and 3**.