Which term is building up of molecules, requiring energy?

Which term is building up of molecules, requiring energy?

• A. Catabolism
• B. Metabolism
• C. Exergonic Reactions
• D. Anabolism

Answer: (D)

Building up of molecules requires energy: this is anabolic activity. Anabolism refers to biosynthetic pathways that assemble complex macromolecules from simpler ones, using energy to form new chemical bonds. Energy currency like ATP or NADPH powers these processes, and they are typically endergonic, meaning they store energy in the new bonds. Examples include protein synthesis from amino acids, DNA replication, and photosynthesis storing energy in carbohydrate bonds. By contrast, catabolism breaks down molecules to release energy, exergonic reactions release energy, and metabolism is the overall term for all chemical reactions in the cell.

Building up of molecules requires energy: this is anabolic activity. Anabolism refers to biosynthetic pathways that assemble complex macromolecules from simpler ones, using energy to form new chemical bonds. Energy currency like ATP or NADPH powers these processes, and they are typically endergonic, meaning they store energy in the new bonds. Examples include protein synthesis from amino acids, DNA replication, and photosynthesis storing energy in carbohydrate bonds. By contrast, catabolism breaks down molecules to release energy, exergonic reactions release energy, and metabolism is the overall term for all chemical reactions in the cell.