Please answer the following question: Extract the answer to the question from the following context. Question: How much of a cell wall is lingnin? Context: Wood is a heterogeneous, hygroscopic, cellular and anisotropic material. It consists of cells, and the cell walls are composed of micro-fibrils of cellulose (40% – 50%) and hemicellulose (15% – 25%) impregnated with lignin (15% – 30%).
A:
15% – 30%