Molecular biology

Molecular biology is really the study of larger scale molecules in living systems. It typically deals with structures that are generally larger than biochemistry aspects. 

A myoglobin molecule. image: wikipedia

Topics of molecular biology generally deal with things such as proteins  and enzyme structures, cell membrane structures such as interactions with DNA e.g. histones

It provides a link to biochemistry in providing details about how some of the biochemistry relates to the function of  small sections of the cell


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Here is a visualisation of the scale of molecular biology and biochemistry from a gold nano particle, antibody, proteins to salicylic acid . image: Andrew White