CELL BIOLOGY (USEFULL FOR NEET, CSIR NET, DBT-JRF, ICMR,BARC,IIT-JAM, M.SC, B.SC WHAT IS CELL?           Cell is the structural an functional unit of life. what actually mean by structural unit? we all know that every organism starts its life from one single cell, zygote. Zygote go through cell division to generate new cell. gradually frequent and regulated cell division result in cell growth and growth of the enzyme. Cell can be prokaryotic or eukaryotic depending upon there organelle present in the cell. Basically wheather the cell have developed nucleus or not the cell can be of eukaryotic or prokaryotic.  Wheather its a prokaryotic or eukaryotic cell the cell membrane shows similar characteristics. Details are discussed below. CELL MEMBRANE:              Cell is the structural and functional unit of life. Cell membrane protects the cell i.e all internal organelle and the intracellular molecules from the external environment. Cell membrane also participates in commu