question_answer 21)

  Who proposed the fluid mosaic model of plasma membrane? (a) Camillo Golgi                                                               (b) Schleiden and Schwann (c) Singer and Nicolson                                                  (d) Robert Brown

Answer:

                  (c) Singer and Nicolson (1972) proposed the structure of cell membrane that was widelyaccepted and called as fluid mosaic model which states that fluid, native of lipidshelps in the movement of protein within the membrane. Schleiden and Schwann (1839) Observed thin outer layer in cells called plasmamembrane and proposed cell theory. Camillo Golgi (1898) discovered the Golgi apparatus. Robert Brown (1831) discovered the nucleus in the cell which was later termed asChromatin by Hemming.