Ch 8: Metabolism Flashcards
Kinetic
Energy in motion
Potential Energy
Stored energy
Thermodynamics
Study of E transformations
What is the first law of thermodynamics?
E cannot be created nor destroyed
What is the second law of thermodynamics?
Every E transfer increases entropy; E for work decreases with each reaction
Endergonic reaction
Require energy input (potential energy difference between reactants and products)
Exergonic reaction
Release E( potential E same in reactants and products)
What orocess releases E from ATP?
Hydrolysis
Where is most E located in ATP?
The covalent bond between 2nd and 3rd phosphate groups
ATP is not easily hydrolyzed
Wrong, it is
What does ATP split into when hydrolyzed?
ATP and Pi (phosphate group)
What does the phosphate group in ATP do?
Phosphorylates cell chemicals to energize reactiojsu
Endergonic reactions do what to ADP?
Phosphorylate it to produce ATP
ATP is a … resource
Renewable
E of activation
Energy needed to start a rxn
Enzymes can lower activation E and gibbs free energy
F, they cant lower gibbs free energy
Enzymes are non specific
Wrong, they catalyze specific rxns
What percent of the world is lactose intolerant?
70%
Lactose intolerance is often
Hereditary
Whats the one factor that can affect enzyme activity that weve never heard of before in life?
Presence of co factors
What do inhibitors do?
Block enzyme action
Competetive inhibbies
Bind to active site
Non competitive inhibbies
Bind to secondary site on enzyme
Negative feedback
Inhibition by product of rxn
