BCHS 3304 Exam 3 Material || All Solved.
enzyme correct answers Definition: a protein which carries out a chemical reaction
protected, orientation correct answers What are the two methods through which enzymes
catalyze reactions?
- providing _________________ environment
- providing all reactive partners in correct ________________
high, mild, high, high correct answers Generally, enzymes have:
1. ___________ reaction rates (high/low)
2. ____________ reaction conditions (extreme/mild)
3. _______________ specificity (high/low)
4. _______________ regulation (high/low)
rate enhancement correct answers What is x in the following equation?
[ x = enzymatic reaction rate / nonenzymatic rate]
oxidoreductase, transferase, hydrolase, lyase, isomerase, ligase correct answers What are the 6
classifications of enzymes?
transferase correct answers Classification: Which class of enzymes involves the transfer of
functional groups?
hydrolase correct answers Classification: Which class of enzymes involves hydrolysis?
,lyase correct answers Classification: Which class of enzymes involves elimination of a group to
form double bonds?
ligase correct answers Classification: Which class of enzymes involves bond formation with ATP
hydrolysis?
complimentarity correct answers _______________ between enzyme and substrate is the basis
of the lock and key model.
induced fit model correct answers Definition: The enzyme-substrate model in which the binding
pockets can be adjusted.
F (enzymatic reactions are HIGHLY stereospecific) correct answers T/F: Enzymatic reactions are
not stereospecific
chiral, chiral correct answers Are enzymes composed of achiral or chiral amino acids? If a
substrate were achiral, what would the chirality be of the product?
no correct answers Does every enzyme require cofactors?
cofactor correct answers Definition: non protein elements of some enzymes that can be broken
down to many subgroups
coenzymes correct answers Along with metal ions, __________________ are a subgroup of
cofactors and are organic/biological cofactors
cosubstrates , prosthetic groups correct answers There are two subgroups of coenzymes:
1. ____________ transiently/temporarily associated coenzymes
2. _____________ __________ permanently enzyme associated.
, holoenzyme correct answers Definition: the name for the catalytically ACTIVE enzyme-cofactor
complex
apoenzyme correct answers Definition: the catalytically INACTIVE protein as a result of the
removal of the cofactor.
reaction coordinate correct answers Definition: the path of minimum free energy which reactants
approach one another
transition state correct answers Definition: representative of the free energy maxima
activation energy, overall free energy correct answers ΔG++ represents:
while ΔG represents:
highest, slowest correct answers The rate determining/limiting step will have the
________________ (highest/lowest) activation energy as is the ____________ step
(fastest/slowest)
transition states, intermediates correct answers In a two step reaction with two "hills", what do
the tops and troughs of the hills represent, respectively?
T correct answers T/F: enzymes and catalysts can reduce the activation energy of both the
forward and reverse reactions
F (enzymes can't alter overall free energy) correct answers T/F: enzymes can alter both ΔG++
and ΔG
acid-base catalysis correct answers What type of catalysis is sensitive to pH since charged amino
acid ionization is affected?
enzyme correct answers Definition: a protein which carries out a chemical reaction
protected, orientation correct answers What are the two methods through which enzymes
catalyze reactions?
- providing _________________ environment
- providing all reactive partners in correct ________________
high, mild, high, high correct answers Generally, enzymes have:
1. ___________ reaction rates (high/low)
2. ____________ reaction conditions (extreme/mild)
3. _______________ specificity (high/low)
4. _______________ regulation (high/low)
rate enhancement correct answers What is x in the following equation?
[ x = enzymatic reaction rate / nonenzymatic rate]
oxidoreductase, transferase, hydrolase, lyase, isomerase, ligase correct answers What are the 6
classifications of enzymes?
transferase correct answers Classification: Which class of enzymes involves the transfer of
functional groups?
hydrolase correct answers Classification: Which class of enzymes involves hydrolysis?
,lyase correct answers Classification: Which class of enzymes involves elimination of a group to
form double bonds?
ligase correct answers Classification: Which class of enzymes involves bond formation with ATP
hydrolysis?
complimentarity correct answers _______________ between enzyme and substrate is the basis
of the lock and key model.
induced fit model correct answers Definition: The enzyme-substrate model in which the binding
pockets can be adjusted.
F (enzymatic reactions are HIGHLY stereospecific) correct answers T/F: Enzymatic reactions are
not stereospecific
chiral, chiral correct answers Are enzymes composed of achiral or chiral amino acids? If a
substrate were achiral, what would the chirality be of the product?
no correct answers Does every enzyme require cofactors?
cofactor correct answers Definition: non protein elements of some enzymes that can be broken
down to many subgroups
coenzymes correct answers Along with metal ions, __________________ are a subgroup of
cofactors and are organic/biological cofactors
cosubstrates , prosthetic groups correct answers There are two subgroups of coenzymes:
1. ____________ transiently/temporarily associated coenzymes
2. _____________ __________ permanently enzyme associated.
, holoenzyme correct answers Definition: the name for the catalytically ACTIVE enzyme-cofactor
complex
apoenzyme correct answers Definition: the catalytically INACTIVE protein as a result of the
removal of the cofactor.
reaction coordinate correct answers Definition: the path of minimum free energy which reactants
approach one another
transition state correct answers Definition: representative of the free energy maxima
activation energy, overall free energy correct answers ΔG++ represents:
while ΔG represents:
highest, slowest correct answers The rate determining/limiting step will have the
________________ (highest/lowest) activation energy as is the ____________ step
(fastest/slowest)
transition states, intermediates correct answers In a two step reaction with two "hills", what do
the tops and troughs of the hills represent, respectively?
T correct answers T/F: enzymes and catalysts can reduce the activation energy of both the
forward and reverse reactions
F (enzymes can't alter overall free energy) correct answers T/F: enzymes can alter both ΔG++
and ΔG
acid-base catalysis correct answers What type of catalysis is sensitive to pH since charged amino
acid ionization is affected?
