Enzymes differ from inorganic catalysts in :

Options

A. not being used up in chemical reactions
B. working at high temperature
C. being proteinaceous in nature
D. working at high pH

Explanation

To answer the question "Enzymes differ from inorganic catalysts in:", we need to analyze the characteristics of both enzymes and inorganic catalysts. Here’s a step-by-step breakdown:

### Step 1: Understand the Nature of Enzymes
- Enzymes are biological catalysts that are primarily made up of proteins. They are organic molecules that facilitate biochemical reactions in living organisms.

### Step 2: Understand the Nature of Inorganic Catalysts
- Inorganic catalysts, on the other hand, are typically metal ions or simple inorganic compounds. They do not have a protein structure and are not derived from living organisms.

### Step 3: Compare Characteristics
- **Proteinaceous Nature**: Enzymes are proteinaceous, meaning they are made of amino acids and have complex structures. In contrast, inorganic catalysts do not have this protein structure.
- **Usage in Reactions**: Both enzymes and inorganic catalysts are not consumed in the reactions they catalyze, meaning they can be used repeatedly.
- **Temperature and pH**: Enzymes generally work at lower temperatures and specific pH levels compared to inorganic catalysts, which can often function at higher temperatures and broader pH ranges.

### Step 4: Identify the Key Difference
- The most significant difference between enzymes and inorganic catalysts is that enzymes are proteinaceous in nature, while inorganic catalysts are not.

### Conclusion
- Therefore, the correct answer to the question is that enzymes differ from inorganic catalysts in being proteinaceous in nature.