BIOL 112 Lecture Notes - Lecture 5: Energy Transformation, Catabolism

• School: McGill University
• Department: Biology
• Course: BIOL 112
• Professor: Lucy- Ann Joseph

Document Summary

Metabolism: anabolic link simple molecules together to make complex ones; energy-storing (requires energy, catabolic break complex molecules into simple ones; releases energy. Energy conversion: one type of energy converted into another type of energy. E. g. brick falls to the ground: potential energy kinetic energy heat. E. g. chemical reactions: chemical bonds heat: first law of thermodynamics. Energy is neither created or destroyed: energy tend to become evenly distributed or dispersed, second law of thermodynamics. Energy spontaneously disperse from being localized to becoming spread out (enthalpy decreases/ h 0) Energy transformations always result in a higher probability state (more disorder) (entropy increases/ s 0: total free energy g=h-ts (t is absolute temperature) Cell and energy: chemical reactions that create disorder in the cell (e. g. digest polymers, chemical reactions that release heat (that disperse into environment)