Biology 1202B Lecture Notes - Dehydration Reaction, Anabolism, Exergonic Reaction

• School: Western University
• Department: Biology
• Course: Biology 1202B
• Professor: Richard Gardiner

Document Summary

The study of energy in living systems (environments) and the organisms (plants and animals) that utilize it. Energy that matter occupies because of its location, arrangement, or position --> energy of position: water behind a dam, chemical energy (gas) Energy in the process of doing work --> energy of motion: heat, light energy. Isolated system - does not exchange matter or energy with its surroundings. Thermos bottom: closed system - exchanges energy with its surroundings. Planet earth: open system - exchanges both energy and mater with its surroundings. Energy cannot be created or destroyed but only converted to other forms. This means that the amount of energy in the universe is constant. All energy transformation are inefficient because every reaction results in an increase in entropy and the loss of usable energy as heat: entropy - the amount of disorder in a system. Biosynthesis: nucleotides -> dna/rna, amino acids -> proteins, co2+h2o -> cho (glucose)