Lecture 1

What does ‘cell theory’ state?

Cells are the fundamental unit of life / all organisms are composed of cells / all cells come from pre-existing cells

What are unicellular organisms?

Single cell carries out all the function of life

What are multicellular organisms?

Made of many cells that are specialised for different functions - tissues / organs

What is the ‘central dogma’ of biology?

DNA makes RNA makes protein

What is the historical landmark of 1665 in determining cell structure?

Hooke uses a primitive microscope to describe small chambers in sections of cork that he calls ‘cells’

What is the historical landmark of 1674 in determining cell structure?

Leeuwenhoek reports his discovery of protozoa. 9 yrs later, he sees bacteria for the first time

What is the historical landmark of 1833 in determining cell structure?

Brown publishes his microscopic observations of orchids, clearly describing the cell nucleus

What is the historical landmark of 1839 in determining cell structure?

Schleiden and Schwann propose the cell theory, stating that the nucleated cell is the universal building blocks of plant and animal tissue

What year did Schleiden and Schwann propose the cell theory?

1839

What year did Brown publish his microscopic observations of orchid?

1833

What year did Leeuwenhoek report his discovery of protozoa?

1674