some important points related to the discovery of cell and its components

Discovery of cell was proposed by Robert Hooke in 1665 and he himself saw the cell under microscope and thus credited with the discovery of cell membrane too.
Discovery of living cell in pond water was discovered by Leeuwenhoek in 1674.
Nucleus was discovered by Robert Brown in 1883.
Cell theory was proposed by Theodor Schwann, Matthias Schleiden, and Rudolf Virchow. That states :
1. All living species on Earth are composed of cells.
2. A cell is basic unit of life.
3. All cells arise from pre-existing cells.
DNA was discovered by James D Watson and Francis Crick.
RNA was discovered by Watson and Arthur.
Dr George Palade is known as the Father of cell biology .