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Energetics for Bio

Energetics for Bio

QuestionAnswer
Energy the capacity to do work (is measured in kilojoules)
Potential Energy energy because of position or state, stored energy
Kinetic Energy Energy of Motion
Photosynthesis (in terms of energy) Light Energy > Chemical Energy
Movement (in terms of energy) Chemical <> Kinetic
First Law of Thermodynamics Energy cannot be created or destroyed, it changes from one form to another
2nd Law of thermodynamics Entropy (disorder) is always increasing; every change in energy, loses useful energy (lost as heat)
what does the universe want? for energy to be evenly dispersed.
Free Energy (G) energy available for work; every chemical has a certain amount of free energy
Exergonic released energy; always have -delta G; spontaneous (doesn't mean instantaneous)
Endergonic need input of energy; + delta G; non-spontaneous
Exergonic reactions are used to... provide energy for endergonic reactions
What does the cell do with energy? It takes it to make ATP from ADP and P
Catabolism Break down of large molecules into smaller ones; exergonic
Anabolism Synthesis of large molecules from smaller ones; endergonic
oxidation-reduction reaction (Redox) used to generate energy; electron donor loses electrons (oxidizes) and electron acceptor gains electrons (reduces)
Electron Carriers get oxidized and reduced as they accept and transfer electrons to another carrier or acceptor
NAD+ example of an electron carrier; very important in respiration; gets oxidized and NADH is reduced
How do cells control reactions? They control the activation energy.
Activation energy energy needed to get a reaction started
Created by: kg92
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