Progress in biology during the 20^th Century

1900 – 1910

Power of experimentation was demonstrated

1928

Anti –bacterial agent was discovered (penicillin)

Gregor Mendel – Mendel’s Law of Heredity

X – Ray crystallography

Method of determining the arrangement of an atom within the crystal.

Other discoveries

• structure and functions of DNA(Deoxyribonucleic acid ,is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms with the exception of some viruses. The main role of DNA molecules is the long-term storage of information. DNA is often compared to a set of blueprint, like a recipe or a code, since it contains the instructions needed to construct other components of cells such as proteins and RNA molecules).

the structure or part of DNA, double helix

• Structure and functions of proteins. (insulin, hemoglobin, antibodies)
• discovery of essential nutrients.

Macro nutrients

Carbohydrates

Proteins

Fats (fat soluble vitamin and water soluble in vitamin)

Micro nutrients

Vitamins

Minerals

Water