# What is the role of symbiosis in cellulose digestion?

Termites also known as wood ants eat wood to meet their nutritional demand. Wood contain 40-50% cellulose. Most of the multicellular organisms can't digests cellulose by their own. Termites also can't do this by their own.
So as there is solution to every query just like that there is also a solution to termite's problem: Termites have special guests i.e certain endosymbiont microbes or bacteria & protozoans. These tiny unicellular organisms reside in hind gut of termite and secrete an enzyme called $\boldsymbol{\textcolor{p u r p \le}{\text{cellulase}}}$ . This enzyme is capable to hydrolyze the $\beta$-linkages of cellulose and form short chain fatty acids. Thus endosymbiont bacteria and protozoans help termite to fulfill its nutrition requirement and also make them quite immune to pathogen attack.