1. The energy of activation refers to the amount of free energy needed to proceed a reaction. A(n) lowers the amount of energy needed to allow the reaction to proceed. a. Carbohydrate b. Enzyme C. Cofactor d. Inhibitor 2. You are watching your little cousin build a tower of blocks. He then knocks them down. The faling blocks is a form of energy. a. Real b. Heat C. Kinetic d. Potential 3. The energy from the sun nourishes plants that then nourish herbivores. As the energy flows through the living system, it usually leaves in the form of a. Heat b. Detritus C. Proteins d. Energy 4. A metabolic pathway that breaks down large molecules into smaller molecules is aln). reaction while a metabolic pathway that builds a large molecule from smaller ones is a(n) reaction. a. Exergonic, endergonic b. Anabolic, catabolic C. Endergonic, exergonic d. Catabolic, anabolic 5. Potential energy is the energy stored by location or structure of matter; however, is the energy of movement. energy a. Kinetic b. Potential C. eat d. Real