Exam 3 (chapters 6,7 & 8)

Physicists often consider energy in two forms. What are they and how do they differ? What is the beginning source of energy on earth and how do organisms on earth utilize this energy?
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Potential and kinetic energy. potential energy is the energy stored in an object as a result of its position (this typically means something in a high place about to roll or fall off). Kinetic energy is a form of energy that an object or a particle has by reason of its motion.
The beginning source of energy on earth is the sun. We can easily trace the food chain to producers which are typically plants who get their energy from the sun.
Enzymes are proteins in specific chemical reactions that aids in lowering the amount of activation energy required.
Temperature- as temperature increases so do enzyme activity, after reaching the optimal temperature if the temperature continues to rise the enzyme will be denatured
pH- same as temperature optimal pH is normally about 6.3
Enzyme concentration-the more enzymes there are the more substrate can be bound to an enzyme at one time increasing the rate of reactions for a short period of time
Substrate concentration- a lot of substrates means it is more likely for a substrate to bump into an enzyme thereby increasing the rate of reaction for a short period of time
Inhibitors/activators- modifies the shape of the enzyme which means the substrate can no longer bind to that enzyme making the reaction slower or sometimes even stop.
Metabolism- the chemical processes that occur within a living organism in order to maintain life
Catabolic pathways- break down
anabolic pathways- build up
the term pathways suggest that it is a series of steps taken to do that action not just one
Enzyme inhibitors control these pathways by preventing them from continuing after certain amount of reactions