Organic chemistry is a branch of chemistry that studies the structure, properties and reactions of organic compounds, which contain carbon in covalent bonding. Study of structure determines their chemical composition and formula.One atom of carbon can combine with up to four other atoms. Therefore, organic compounds usually are large and can have several atoms and molecules bonded together. Organic molecules can be large, and they comprise the structural components of living organisms: carbohydrates, proteins, nucleic acids, and lipids Organic chemistry is the most dreaded of all science classes. It has the highest failure rate, lowest class average and more retakes than any other science course. Yet most schools weigh organic chemistry about the same as general chemistry or physics There isn't much math involved in organic chemistry. However, when you start going a bit deeper into organic chemistry, you will start to see that mathematics (physics-type math) actually does play an important role in chemistry for understanding the details of reaction mechanisms If application suites your learning style, organic chemistry will be easier to you, and if you have a great memory and can fit many puzzle pieces together, biochemistry will be easier for you. None is exclusively harder than the other Biochemistry is hard, because it assumes you know a lot of relatively knew knowledge Biochem uses organic chemistry, a class you take in college. Hell you might take biochem right after it. Biochem uses cellular and molecular biology.