What is the biochemistry, and how does it differ from the fields of gentics, biology, chemistry, and molecular biology?

Biochemistry is the study of the structure, composition, and chemical reactions of substances in living systems.

Biochemistry differs from:

• Genetics is the study of heredity of inherited variation that has no type of chemical reactions.

• Biology is also study of living organisms but the difference is that it divides into specialized fields

• Chemistry is the science of matter the difference between them is that biochemistry has to do with the body while chemistry deals with molecules. 
• Molecular biology is study of biology at a molecular level the difference between them is that biochemistry is based more on molecules of life rather then molecular biology is based more on DNA, RNA and protein synthesis.