Which of the followlng is/are polymer?

Options

A. Enzyme
B. Starch
C. Cellulose
D. Protein

Answer

To determine which of the following substances are polymers, we will analyze each option provided: enzymes, starch, cellulose, and proteins.

### Step-by-Step Solution:

1. **Understanding Polymers**:
- A polymer is a large molecule composed of repeating structural units (monomers) connected by covalent chemical bonds. Polymers can be natural (biopolymers) or synthetic.

2. **Analyzing Enzymes**:
- Enzymes are biological catalysts that speed up chemical reactions in the body. They are primarily proteins, which are polymers made of long chains of amino acids. Therefore, enzymes are polymers.

3. **Analyzing Starch**:
- Starch is a polysaccharide, which is a type of carbohydrate. It is composed of long chains of glucose units (specifically, alpha-glucose). Since starch consists of repeating glucose units, it qualifies as a polymer.

4. **Analyzing Cellulose**:
- Cellulose is another polysaccharide, but it is made up of beta-glucose units. Like starch, it consists of long chains of repeating units, making it a polymer as well.

5. **Analyzing Proteins**:
- Proteins are made up of amino acids linked together by peptide bonds. A protein can be considered a polymer because it consists of long chains of amino acid monomers. Hence, proteins are also polymers.

6. **Conclusion**:
- All the substances listed (enzymes, starch, cellulose, and proteins) are polymers. They are all biopolymers, which have significant biological importance.

### Final Answer:
All of the following are polymers: enzymes, starch, cellulose, and proteins.