The portion of an enzyme to which substrates bind is referred to as the
A) substrate complex.
B) active site.
C) catalytic site.
D) junction of van der Waals forces.
What is the difference between a coenzyme and a prosthetic group?
A) Coenzymes are essential for an enzyme's function and prosthetic groups only enhance its reaction rate.
B) Coenzymes are weakly bound whereas prosthetic groups are strongly bound to their respective enzymes.
C) Coenzymes are organic cofactors and prosthetic groups are inorganic cofactors.
D) Coenzymes require additional ions to bind to enzymes but prosthetic groups are able to directly interact with enzymes.
Activation energy is the energy
A) required to transform all reactants into their reactive state.
B) given off as the products in a chemical reaction are formed.
C) absorbed as G0' moves from negative to positive.
D) needed by an enzyme to catalyze a reaction without coenzymes.
A catalyst
A) requires more reactants but makes the reaction rate faster.
B) increases the amount of reactants produced but does not change the rate.
C) changes the rate of the reaction but does not change the end amount of products.
D) changes both the rate of a reaction and the amount of the product that will be obtained as the reaction is completed.
If G0' is negative, the reaction is
A) exergonic and requires the input of energy.
B) endergonic and requires the input of energy.
C) exergonic and energy will be released.
D) endergonic and energy will be released.
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