Thus, knowing a cell and its functions is important. Cell: The Unit of Life, a chapter in the NCERT Class 11 Biology textbook This chapter belongs to Unit 3, Cell: Structure and Function.

Functions: Plasma membrane permits the entry and exit of some materials in the cells. Therefore, plasma membrane is known as selective permeable membrane. (i) Diffusion: The spontaneous movement ...

Control cell growth and differentiation The extent to which the structure of proteins has an impact on their function is shown by the effect of changes in the structure of a protein.