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Which is the best definition of activation energy? the energy required to end a chemical reaction the energy required to bind a substrate to an active site the energy required to break the bonds of
reactant molecules the energy required to re-form bonds in product molecules
The energy required to break the bonds of reactant molecules is the best definition of activation energy.
Expert answered|jeifunk|Points 11877|
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Asked 12/9/2013 7:56:20 AM
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The lock-and-key mechanism refers to the complementary shapes of an enzyme and a substrate. the attractive forces between an enzyme and a substrate. the ability of an enzyme to lower the activation energy of a reaction. the ability of an enzyme to unlock the products of a reaction.
Weegy: Lock and Key Theory: The specific action of an enzyme with a single substrate can be explained using a Lock and Key analogy first postulated in 1894 by Emil Fischer. In this analogy, the lock is the enzyme and the key is the substrate. [ Only the correctly sized key (substrate) fits into the key hole (active site) of the lock (enzyme). Smaller keys, larger keys, or incorrectly positioned teeth on keys (incorrectly shaped or sized substrate molecules) do not fit into the lock (enzyme). Only the correctly shaped key opens a particular lock. ] (More)
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Asked 12/9/2013 7:49:25 AM
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