Biology 1002B Lecture Notes - Lecture 6: Exergonic Reaction, Enzyme, Room Temperature
26 Jan 2017
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Allow both energy and matter in and out. Food is matter and energy ex. glucose, amino acids, fatty acids. Photosynthesis is an example where matter and energy are separate: photon has no mass, only energy, photosynthetic organisms breathe nitrogen and carbon (nutrients) but those don"t have energy, only matter. Molecules break down example of entropy: proteins break down, mrna breaks down, cycle continues in living systems. Bonds within a protein are constrained because of peptide bonds. Protein constrains amino acids they can only move a certain number of ways. Glucose constrains possible space the atom can occupy. Breakdown = waste and heat energy released to the environment: heat and waste molecules increase disorder in surroundings, temperature rises because of the second law of thermodynamics (entropy) Protein synthesis is a negative/low entropy phenomenon taking disorder and making order out of it. Taking things more disordered (more spread out) and making them more orderly (energy is more concentrated)
