Enzymes differ from ordinary catalysts , because the enzymes consist of

Options

A. vitamins
B. non - proteins
C. proteins
D. minerals

Answer

To answer the question "Enzymes differ from ordinary catalysts because the enzymes consist of," we will analyze the options provided and understand the characteristics of enzymes compared to ordinary catalysts.

### Step-by-Step Solution:

1. **Understanding Enzymes**: Enzymes are biological catalysts that speed up chemical reactions in living organisms. They are primarily composed of proteins.

2. **Characteristics of Ordinary Catalysts**: Ordinary catalysts can be inorganic substances and do not necessarily have a biological origin. They can be metals or metal compounds that facilitate chemical reactions without being consumed in the process.

3. **Analyzing the Options**:
- **Vitamins**: While some enzymes require vitamins as cofactors, enzymes themselves are not vitamins. Therefore, this option is incorrect.
- **Non-proteins**: Enzymes are not classified as non-proteins; they are predominantly proteins. Thus, this option is also incorrect.
- **Proteins**: This is the correct option. Enzymes are indeed proteins that perform catalytic functions.
- **Minerals**: Enzymes do not consist of minerals; they may require minerals as cofactors, but they are not made of minerals. Thus, this option is incorrect.

4. **Conclusion**: The correct answer is that enzymes consist of **proteins**. This distinguishes them from ordinary catalysts, which can be inorganic and do not have a protein structure.

### Final Answer:
Enzymes differ from ordinary catalysts because the enzymes consist of **proteins**.