6. Enzymes and Enzyme Kinetics
Enzymes
6. Enzymes and Enzyme Kinetics
Enzymes
1
concept
Enzymes
2m
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2
Problem
ProblemHexokinase uses ATP to convert glucose into glucose-6-phosphate during glycolysis. Which option is true?
A
Hexokinase is a fibrous protein.
B
Hexokinase is permanently altered in the enzymatic reaction.
C
Hexokinase is a molecular catalyst.
D
Hexokinase & all enzymes are proteins.
3
concept
Enzymes
4m
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4
Problem
ProblemWhich graph below corresponds with a reaction that has an equilibrium constant less than 1 (Keq < 1)?
A
B
C
5
Problem
ProblemThe enzyme catalase converts hydrogen peroxide into water and oxygen gas. Which of the following is true?
A
All enzymes utilize ATP to catalyze reactions.
B
All hydrogen peroxide is converted to products.
C
Catalase stops catalyzing when reaction reaches equilibrium.
D
Catalase catalyzes forward & reverse reactions at equilibrium.
6
concept
Enzymes
4m
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7
Problem
ProblemWhich of the following is the best description of what an enzyme does?
A
It allows a chemical reaction to proceed extremely fast.
B
It increases the rate at which a chemical reaction reaches equilibrium relative to its uncatalyzed rate.
C
It makes a reaction thermodynamically favorable to allow it to proceed faster.
8
Problem
ProblemWhich of the following best describes how enzymes catalyze reactions?
A
Alter the equilibrium constant (Keq) of a reaction.
B
Decrease the thermodynamic free energy (ΔG) of a reaction.
C
Change nonspontaneous reactions into spontaneous reactions.
D
Force reactions to proceed in only one direction.
E
Stabilizing the transition state.
F
c & d.