Biology reminder
The majority of living beings is composed of cells
There is a high degree of similarity between cells from different species
A cell is composed of :
- 75 to 80 % of water
- 10 to 20 % of nucleic acids and proteins
- 2 to 3 % of lipids
- 1 % of carbohydrates
- 1 % of inorganic elements
A human organism is composed of about 1015 cells
The structure and the function of a cell, as well as those of a complete organism, are coded in DNA molecules.