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Enzymology Actual Exam| questions with Complete Solutions
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Enzymology Actual Exam| questions withComplete Solutions
Which of the following statements is/are true?
A. Enzymes do not change the free energy
B. Enzymes affect free energy
C. Enzymes speed up the rate of a reaction
D.A&C
E.B&C-✔D.A&C
When delta G‡ increases in the rate-determining step, what is the effect on the rate
of reaction?
A. Increases
B. Decreases
,C. No change - ✔B
Free energy is most available at what point in the reaction?
A. Reactant ground state
B. Product ground state
C. After product is made
D. During the transition state
E. Free energy is always the same - ✔D
What do enzymes do?
A. Change free energy
B. Change the equilibrium
C. Accelerate the rate of reaction
D. Alter delta G for the reaction - ✔C
How do enzymes differ from chemical catalysts?
A) Capacity for regulation
B) Slower reaction rates
C) Greater reaction specificity
D) Harsher reaction conditions
E) Both A and C - ✔E. A & C
Substrate binding allows?
A. Entropy reduction
B. Desolvation of substrate
C. Formation of strong interactions
D.A&B
,E.B&C-✔D.A&B
A negative delta G would mean what for the reaction?
A. The reaction is spontaneous
B. The reaction is not spontaneous
C. The reaction is at equilibrium
D. The reaction can always take place
E. The reaction can never take place - ✔A
enzymes ____the ____ of a reaction
A accelerate, rate
B increase, entropy
C stop, rate
D decrease, rate
E decrease, energy - ✔A
The point of _________ energy is called the transition state
A. highest free
B. lowest free
C. highest confined
D. lowest constant
E. highest constant - ✔A
Which of the following are true about enzymes?
A. Free energy predicts the spontaneity of a reaction.
B. Enzymes do not change free energy.
C. Enzymes accelerate the rate of the reaction.term-23
, D. Enzymes decelerate the rate of the reaction.
E. More than one of the choices. - ✔E
Which of the following is not included in the EC number
A. class
B. subclass
C. sub-subclass
D. systematic name
E. individual serial number - ✔D
Substrate binds to enzyme via ______ forces.
A covalent
B strong
C weak
D dispersion
E stationary - ✔C
In terms of relative specificity, the enzyme's role is to _______.
A.) catalyze the reaction of one unique substrate to a particular product
B.) catalyze a reaction in which one stereoisomer is reacted or formed in preference to
all others that might be reacted or formed
C.) catalyze the reaction of structurally related substrates to give structurally related
products D.) be selective in regards to the chemical groups on the substrates
E.) be specific for only one compound - ✔C
What does substrate binding allow?
A. Desolvation of substrates
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