Difference between biochemistry,cell biology, molecular biology,genetics……..

They all overlap a bit.

Biochemistry does deal with chemical reactions such as in catabolism and anabolism, but its main focus tends to be the structure and function of proteins and the methods for studying these such as X ray crystallography, NMR etc

Molecular biology is similar to Biochemistry in that it deals with the structure and function proteins (but less on how to study them), but it also deals with genes much more strongly. Molecular biology and biochemistry can both deal with how genes are expressed in cells, but molecular biology takes genes further by considering genetic approaches to things - e.g. genetic engineering and how to study genes.

Genetics would cover most of the same genetic parts of molecular biology but also includes a non-molecular part - e.g. population genetics, evolutionary genetics etc.

Cellular biology is just the biology of a cell. This takes aspects of biochemistry, molecular biology and genetics and applies it to the cell. Instead of focussing on individual genes and proteins, it would deal with how a combination of them results in a particular outcome for the cell. For example, cell signalling would be discussed which is a biochemical process. The cell cycle, protein targetting and cell structure are other examples of cell biology topics. The different compartments of cells would also be discussed in cellular biology, eg the nucleus, endoplasmic reticulum, golgi etc

It really depends on where you're studying it though, different places will have different approaches to each subject.

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Cellular biology is the biology of cells, it looks at all the things that make cells tick, specifically what signaling molecules and growth factors they need to survive or that make them do certain things. The topic would also look at what substances different cell types make and what the function of the cells are.

Biochemistry is the study of the chemical reactions that occur in a biological organism. There are many thousands of chemical reactions that occur in every one of you cells all the time. Every reaction that is catalysed by an enzyme for instance would be the sorts of things that biochemists look at, for example working out all those reactions in Creb's cycle that you use to convert glucose into ATP.

Molecular biology is the study of the genes inside a cell. Cell biology tends to be about the proteins in a cell, whereas molecular biology is about the genes that are expressed. You would look at how different genes are regulated, and which are switched on in what circumstances.

Genetics is about how the genome affects the individual, ie how the set of genes you have affects your phenotype. I have a friend who is a geneticist and she is studying how different genes give rise to beta Thalassaemia, a type of blood disorder.

cellular focus on cells in biology
biochemistry focus is biochemical reactions
molecular focus on cells in the molecular level
genetics focus is evolution and what not
biology alone i think can be seperated into two groups the skin in and the skin out

Molecular biology is the study of biology at a molecular level. The field overlaps with other areas of biology, particularly genetics and biochemistry. Molecular biology chiefly concerns itself with understanding the interactions between the various systems of a cell, including the interrelationship of DNA, RNA and protein synthesis and learning how these interactions are regulated or it is also said that it is Molecular biology is the study of the genes inside a cell. Cell biology tends to be about the proteins in a cell, whereas molecular biology is about the genes that are expressed. You would look at how different genes are regulated, and which are switched on in what circumstances.
Cellular biology is the biology of cells, it looks at all the things that make cells tick, specifically what signaling molecules and growth factors they need to survive or that make them do certain things. The topic would also look at what substances different cell types make and what the function of the cells are or it is also said that it is Cellular biology is just the biology of a cell. This takes aspects of biochemistry, molecular biology and genetics and applies it to the cell. Instead of focussing on individual genes and proteins, it would deal with how a combination of them results in a particular outcome for the cell. For example, cell signalling would be discussed which is a biochemical process. The cell cycle, protein targetting and cell structure are other examples of cell biology topics. The different compartments of cells would also be discussed in cellular biology, eg the nucleus, endoplasmic reticulum, Golgi