Which of the following are Biopolymers?

Options

A. Proteins
B. Polystyrene
C. DNA
D. Glucose

Answer

To determine which of the given options are biopolymers, we need to understand the definition of biopolymers and analyze each option provided.

### Step 1: Understand the Definition of Biopolymers
Biopolymers are naturally occurring polymers that are derived from living organisms. They are not synthetically manufactured or modified. Common examples include proteins, nucleic acids (like DNA), and polysaccharides.

**Hint:** Remember that biopolymers come from natural sources and are not created in labs.

### Step 2: Analyze Each Option
1. **Proteins**: Proteins are indeed biopolymers. They are made up of long chains of amino acids (the monomers) and play crucial roles in biological functions.

**Hint:** Think about the building blocks of proteins and where they come from.

2. **Polystyrene**: Polystyrene is a synthetic polymer made from the monomer styrene. It is not derived from natural sources and is therefore not a biopolymer.

**Hint:** Consider whether the material is found in nature or created in a lab.

3. **DNA**: DNA (deoxyribonucleic acid) is a biopolymer that carries genetic information in living organisms. It is composed of nucleotide monomers.

**Hint:** Reflect on the role of DNA in living organisms and its natural occurrence.

4. **Glucose**: Glucose is a simple sugar and a monomer, not a polymer. While it is naturally occurring, it does not fit the definition of a biopolymer since it is not a long chain of repeating units.

**Hint:** Identify whether the substance is a polymer (long chain) or a simple molecule.

### Step 3: Conclusion
From the analysis:
- **Proteins** and **DNA** are biopolymers.
- **Polystyrene** is not a biopolymer.
- **Glucose** is not a biopolymer.

Thus, the correct answers are **Proteins (Option 1)** and **DNA (Option 3)**.

**Final Answer:** Proteins and DNA are biopolymers.