Question

One of the most resistant biological material is

• A. Lignin.
• B. Hemicellulose.
• C. Lignocellulose.
• D. Sporopollenin.

Answer 1

The correct option is D

Sporopollenin.

The correct option is D.

Explanation for the correct option:

1. Due to its high stability and chemical inertness, sporopollenin is the most resistant biological substance.
2. It is a component of the strong outer wall of plant spores and aids in the cell wall's resistance to chemicals and enzymes that can dissolve plant cell spores.
3. It is also found in flower pollen grains and aids in protecting pollen grains from severe circumstances.

Explanation for the incorrect options:

Option A:

1. One of the complex organic polymers found in some vascular plants and some algae is lignin.
2. It is crucial for the development of the cell walls in both plants and algae.
3. It is an extremely stiff complex molecule that does not easily rot.

Option B:

The main component of a plant's cell wall is hemicellulose.

Option C:

The most prevalent substance on Earth is lignocellulose, which is also a type of biofuel since it is the dry matter of plants.

Final answer: One of the most resistant biological materials is sporopollenin.