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Unit 3 Cell Enrgetic

AP Bio

QuestionAnswer
Metabolism All of the chemical reactions in an organism
Metabolic pathways Series of chemical reactions that either build complex molecules or break down complex molecules
Catabolic pathways Pathways that release energy by breaking down complex molecules into simple coumpunds
Anabolic Pathways Pathways that consume energy to build complicated molecules form simpler ccompounds
Energy the ability to do work
Organisms need energy to survive and function, a loss of energy flow results in death
Kinetic energy Energy associated with the movement of atoms or molecules
Potential energy stored energy
Chemical energy potential energy available for release in a chemical reaction
Thermodynamics The study of energy transformations in matter
1st Energy cannot be created or destroyed
2nd Energy transformation increases the entropy (disorder of the universe). During energy transfers or transformations, some energy is unusable and often lost as heat.
In comparison to early life on Earth, organisms today are highly organized and complex. How does this increase in organization over time not violate the 2nd law of thermodynamic? The entropy of organism may decrease, as long as the total entropy of the universe increase.
Free Energy The likelihood of reactions in organism, or if the reactions are energetically favorable. The free Energy change of reaction determine whether or not the reactions occurs spontaneously. No outside input of energy required
Exergonic reactions Reactions that release energy. (E.g. cellular respiration)
Endergonic reaction Reactions that absorb energy. (E.g. photosynthesis)
Cells Are not at equilibrium
Mechanical movement
transport pumping substances across membranes against spontaneous movement
Chemical Synthesis of molecules
Created by: Leo12345
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