Enzymes 3 Flashcards
The distinguishing feature
of an enzyme-catalyzed
reaction is that it takes
place within the confines
of a pocket on the enzyme
called the
active site
provides a specific
environment, customized
by evolution, in
which a given reaction can
occur more rapidly
active site
molecule that is bound in the active site and acted upon by the enzyme is called
substrate
The surface of the active site is
lined with _______ that bind the substrate
and catalyze its chemical transformation.
amino acid residues with
substituent groups
It is also the starting
point for mathematical treatments
that define the kinetic behavior of enzyme-catalyzed reactions and for theoretical
descriptions of enzyme mechanisms.
enzyme-substrate complex
central to the action of
enzymes
enzyme-substrate complex
The function of a catalyst is to
increase the rate of a reaction
True or False: Catalysts do
not affect reaction equilibria.
True
True or False: A higher activation energy corresponds to a faster reaction.
False; slower reaction
How to increase reaction rate?
Increase pressure and temperature
How to lower activation energy (increase reaction rate)
adding catalyst
accelerate the interconversion of S and P
enzymes
Boltzmann constant
k
Planck’s constant
h
relationship between the rate constant k and the activation energy is
inverse and exponential
