Biochemistry is the study of the chemical processes occurring in living matter. It majorly focus on the role, function, and structure of biomolecules. In general it deals with enzymes, carbohydrates, amino acids, proteins, fats, hormones, DNA, RNA, etc.

Energy coupling reaction.

Exergonic to Endergonic and vice-versa Catabolic to Anabolic and vice-versa Energy coupling: transfer of energy from one reaction to another in order to drive the second reaction. Exergonic reactions: delta G ≤ 0, spontaneous, release free energy Endergonic reactions: delta G ≥ 0, Non-sponatneous, absorbs free energy.   Example: 6th and 7th step of glycolysis