Anabolic reactions are characterized by which of the following?

Anabolic reactions are characterized by the synthesis of complex molecules from simpler ones, often requiring an input of energy. This process conserves energy because it stores it in the newly formed chemical bonds of the larger molecules. The anabolic pathway is essential for growth and repair in living organisms, allowing for the construction of proteins, nucleic acids, and other macromolecules from their monomer units.

For example, during the process of protein synthesis, amino acids are linked together to form proteins, a reaction that requires energy input in the form of ATP. This is in contrast to catabolic reactions, which involve breaking down larger molecules into smaller ones, typically releasing energy in the process.