Final answer:
Anabolism, or anabolic reactions, refer to the processes in cells that synthesize larger biomolecules from smaller ones using energy typically derived from ATP, NADH, and NADPH. These reactions are fundamental for cell growth, repair, and maintenance and usually occur when the organism is in a nutrient-rich, or fed, state.
Step-by-step explanation:
The term for the synthesis of large biomolecules from smaller ones, which requires the input of energy and occurs in a fed state, is anabolism or anabolic reactions. Anabolic reactions are part of a larger series of metabolic pathways that occur within cells. In these biosynthetic processes, energy-rich molecules like ATP (adenosine triphosphate) as well as NADH (nicotinamide adenine dinucleotide) and NADPH are used to construct larger and more complex molecules from smaller molecular units. Examples include the synthesis of proteins from amino acids and the formation of DNA strands from nucleic acids. These processes are crucial for maintaining the structure, function, and growth of cells and ultimately the organism.