lecture 13 part 1 Flashcards
what must happen for both endergonic and exergonic reactions to occur
reactnats must vercome the E of activation (Ea) barrier
energy of actviation (Ea)
minimum energy equired by reactants to start chem rxn
with Ea, reactnats need to reach
a LESS stabile trasnition state
enzymes
protein ctaalysst that lower the Ea of a biochemical reaction
enzymes are necessary for
life
what do enzymes allow
thermodynaicmally favorable (exergonic) rxns to occur more quikcly
do enzymes impact thermodynamics or rxn
no
do enzymes change the sign or value of delta G
no
do enzymes supply energy to make rxn more favorable
no
some enzymes catalyze what type of reaction
coupling reactions
enzymes couple endergonic rxns iwth what to alow what to take place
with exergonic reactions to allow endergonic rxns to take place
when will an endergonic rxn only take place
if the exergonic rxn releases more energy than the endergonic rxn needswh
why do high erngy bonds have less stabile bonds than covalent bonds
because phosphate group is negatively charged which makes it ustable
are most ion channels open
no
do enzymes get consumed by biochem rxns
no
