Energy, ATP, Enzymes Flashcards
what makes a reaction spontaneous on its own?
release of potential energy from bonds, increase in entropy, goes in forward reaction more than reverse
what makes G endergonic?
makes fewer molecules, makes bigger molecules from smaller molecules, more energy in C-H bonds than C-O bonds
anabolic reactions
adding smaller molecules together to create a bigger one (adding), requires energy
catabolic reaction
breaking down a bigger molecule into smaller ones (cutting), releases energy
what is ATP?
adenosine triphosphate, nucleotide
why does ATP provide energy?
the phosphate bonds have a lot of energy, and ATP can be broken down into ADP + Pi, and this energy is released when ATP is broken down
energy of activation
amount of energy needed for reaction to proceed
enzymes
biological catalysts, end in “ase”
catalyst
compound that lowers activation energy for a reaction
what is coupling of reactions?
adding an exergonic reaction to an endergonic reaction so the endergonic reaction can occur
lock and key fit
the enzyme and substrate’s shapes perfectly match so they can bond
induced fit
the enzyme and substrate’s shapes slightly change once bonded to make the bonds stronger
