What type of chemical reactions are molecules joined together to form more complex molecules?

Anabolic reaction are specific type of reaction in which molecules joined together to form more complex molecules.

Explanation:

Metabolic reactions are catagorized into 2 types

1 Catabolic reactions: chemical or biochemical reactions that helps in the breakdown of complex molecules such as lipid,proteins and carbohydrates to convert them into their monomeric substituents such as fatty acid,amino acids and monosaccharides. Catabolism or breakdown of macromolecules proceed with the generation of free energy in form of ATP.

2 Anabolic reactions : Anabolic reactions can be defined as chemical or biochemical reactions in which molecules are joined to form more complex molecules.For examples monosaccharides can be joined by glycosidic linkages to form polysaccharides,amino acids can be joined with peptide bonds to form polypeptide chains which further constitute a protein.Anabolic reactions requires free energy from outside source .