makes up 20 to 30% of the wood cell wall substance. As one of the by-products, this lignin has many uses—for example, in composite materials. One example of its use is in car panels." ...

In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and ...

Lignin is synthesized by polymerization of these components and their ratio within the polymer varies between different plants, wood tissues and cell wall layers. Cellulose, hemicellulose and ...