How does cell biology similar to molecular biology and molecular genetics?

Answer 1

Cell Biology - study of whole cells and their organelles

Molecular Biology - study of the molecules & their interactions in the cell

Molecular genetics - study of the genes at their molecular levels

all of them are interrelated to one thing i.e. cell

Answer 2

Cell biology, molecular biology and molecular genetics are the study of the chemical processes occurring within the cells of organisms.

Cell biology primarily focuses on the structure of the cell - e.g plasma membrane, nucleus, ribosomes etc - what they do and how they do it - this includes chemical processes as the vast majority of proteins in the cell are catalysts (enzymes) that ensure the correct processes happen in the correct cellular locations.

Molecular biology looks in deeper detail at what causes chemical processes to happen e.g. looking at the crystal structure of a protein to see where its active site is and what causes it to lower the activation energy of a given reation.

Molecular genetics is concerned with what molecules interact with DNA to change gene expression - gene expression is when genes are transcribed to RNA and translated to proteins - all of these are chemical processes.

In short - you cannot extract chemistry from biology or vice versa because all organisms are made of chemicals and run on chemical reactions of myriad types. Any branch of biology will look at chemical processes if you look deep enough.