Molecular Biology is a branch of science concerning biological activity at the molecular level. Molecular Biology investigates the process of  

-replication,

-transcription,

-translation and

-cell function

The central dogma of molecular biology where genetic material is transcribed into RNA, and then translated into protein. Molecular genetics accepts that it is the most prominent sub-field of molecular biology. Genetic investigates `the effect of genetic  and genetic differences on organisms`. It compares wild type (normal) phenotype with knockout or overexpress studies (genetically modified experimental animal models). The central dogma of molecular biology is an explanation of the flow of genetic information within a biological system.