Final answer:
Anabolism is the process of combining smaller molecules to form larger, more complex substances. It occurs in living things and requires energy. Examples of anabolic reactions include building bone, muscle mass, and new proteins, fats, and nucleic acids.
Step-by-step explanation:
Anabolism is the process whereby smaller, simpler molecules are combined into larger, more complex substances.
This process occurs in living things and allows the body to assemble complex chemicals needed for growth and maintenance.
Anabolic reactions require energy and use ATP as the energy source. For example, anabolic reactions build bone, muscle mass, and new proteins, fats, and nucleic acids.