Which one of the following natural polymers is found in both insects and fungi

Options

A. Pectin
B. Chitin
C. Cellulose
D. Suberin.

Answer

To answer the question "Which one of the following natural polymers is found in both insects and fungi?", we can follow these steps:

### Step 1: Understand the Options
The options given are:
- Pectin
- Chitin
- Cellulose
- Submarine

### Step 2: Analyze Each Option
- **Pectin**: This is a natural polymer found primarily in the cell walls of plants. It is not found in insects or fungi.
- **Chitin**: This is a fibrous substance that is a polymer of N-acetylglucosamine. It is a key component of the exoskeletons of arthropods (which include insects) and the cell walls of fungi.
- **Cellulose**: This is another plant polymer, found in the cell walls of plants, and is not present in fungi or insects.
- **Submarine**: This term seems to be a misnomer in the context of natural polymers; it does not refer to a known polymer.

### Step 3: Identify the Correct Answer
From the analysis, we can see that **chitin** is the only natural polymer listed that is found in both insects (as part of their exoskeletons) and fungi (as part of their cell walls).

### Conclusion
The correct answer to the question is **chitin**.

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