Explanation: It is a white solid material that exists in both the states. It is about 50 – 70% crystalline and forms the “back-bone” structure of wood fiber.

Explanation: Lignin is more highly concentrated in the middle lamella and primary cell wall regions of the wood fiber than any other part of cell wall.

Explanation: On the molecular level, cellulose is a linear polymer of anhydro-D-glucose connected by beta-(1-4)-linkage. The degree of freedom, which is the number of units (Glucose in this case) that make up polymer above 10,000 in unaltered wood.

In the respective percentages 50%, 44.5%, 6.1%, and 0.5%.

Explanation: Microfibrils are oriented in different directions in each of three layers within secondary cell wall.

Explanation: Hemicellulose increase the strength of the paper and the pulp yield, especially tensile, burst, and fold.

Explanation: Hemicellulose are condensation polymers with a molecule of water removed with every linkage.

Explanation: Lignin is the compound which is a complex polymer consisting of phenylpropane units and has an amorphous three-dimensional structure. Its molecular weight in wood is very high and cannot be easily measured.

Explanation:Extractives are the compound of diverse nature with low to moderately high molecular weights, which by definition are soluble in organic solvents, and water. They impart colour, odor, taste, and ocassionaly, decay resisitance to wood.

Explanation: Terpenes are a broad class of compounds appearing in relatively high quantities in the softwoods.