Intro To Metabolism Flashcards
First law of thermodynamics
Energy can be transferred or transformed , but not created or destroyed
Second law of thermodynamics
The conversion of energy to thermal energy is released as heat by living things
Metabolism
Totality of an organisms chemical reactions
Metabolic pathway
Specific molecule altered in a series of steps by a specific enzyme to produce a product
Catabolic pathways
Release energy by breaking down complex molecules into simpler compounds
Ex cellular respiration, breakdown kd clucose I’m presences o2
“Downhill” reactions
Anabolic reactions
Energyisneeded
Consume energy to build complex molecules from simpler ones
Synthesis of proteins from amino acids
“Uphill” reactions
Energy
Capacity to cause change
Thermal energy
Kinetic energy associated with random movement of atoma or molecules
Heat
Transfer of thermal energy from one body to another
Chemical energy
Potential energy available for release in a chemical reaction
Example ATP
Potential energy
energy that matter possesses because of its location or structure
Entropy
Measure of disorder in the universe
Delta g is negative
Spontaneous process
Loses free energy, becomes more stable
Cellular respiration
Exergonic reaction
Delta g is zero or positive
Nonspontaneous process
Delta g=
G(final state)- G(initial state)
