Final answer:
Biochemical reactions are chemical reactions that occur within a cell, and they are part of the field of biochemistry in biology.
Step-by-step explanation:
Biochemical reactions, also known as metabolism, are the collection of chemical reactions that occur within a cell. These reactions are responsible for various processes such as breaking down molecules to obtain energy (catabolism) and building new molecules needed by living systems (anabolism).
Some examples of biochemical reactions include glycolysis, where glucose is converted to pyruvic acid, and cellular respiration, which is a series of metabolic reactions that produce energy from carbohydrates, proteins, and fats.