Cell: The Unit of Life — BIO BOTANY STD 11 — Question

The protoplasm exist either in semisolid (jelly – like) state called ‘gel’ due to suspended particles and various chemical bonds or may be liquid state called ‘sol’. The colloidal protoplasm which is in gel form can change into sol form by solation and the sol can change into gel by gelation. These gel – sol conditions of colloidal system are prime basis for mechanical behaviour of cytoplasm.