An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

Options

A. Lignin
B. Cellulose
C. Cuticle
D. Sporopollenin

Answer

To answer the question about an organic substance that can withstand environmental extremes and cannot be degraded by any enzyme, we can follow these steps:

### Step 1: Identify the Options
We have four options to consider:
1. Lignin
2. Cellulose
3. Cuticle
4. Sporopolinin

### Step 2: Analyze Each Option
- **Lignin**: This is a complex organic polymer found in the cell walls of plants, providing rigidity and resistance to decay. While it is resistant, it can still be broken down by certain enzymes.

- **Cellulose**: This is a polysaccharide that forms the structural component of plant cell walls. It can be degraded by cellulase enzymes.

- **Cuticle**: This is a protective layer covering the epidermis of leaves and stems, composed mainly of cutin and waxes. It provides some resistance to degradation but is not entirely enzyme-resistant.

- **Sporopolinin**: This is a biopolymer found in the outer layer of pollen grains. It is known for its extreme resistance to degradation, even under harsh environmental conditions such as high temperatures and strong acids or bases.

### Step 3: Conclusion
Among the options provided, **Sporopolinin** is the organic substance that can withstand environmental extremes and cannot be degraded by any known enzyme. Therefore, the answer is **Sporopolinin**.

### Final Answer
The organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is **Sporopolinin**.

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