Q- What is the energy source for active transport through biological membrane? Answer- The energy source for active transport through biological membrane is ATP.

Q- Give the chemical nature of plasma membrane? Answer- The chemical nature of plasma membrane is liproteinous which is formed of lipid as well as protein. Easy way to draw labelled diagram of plasma membrane:

Q- Give the chemical nature of cell wall of plant cells. Answer- The chemical nature of cell wall of plant cell is of cellulose mainly the cell wall in plant cell is formed or consisted of cellulose. Easy way to draw labelled diagram of cellulose:

Q- What is structural and functional unit of life? Answer- Cell is the structural and functional unit of life.