Question 1

The temperature is raised slightly above the optimum for a specific enzyme.What would you expect to observe as a result of the change in temperature?

Accepted Answer

A) increased enzyme activity 
B) decreased enzyme activity 
C) no change in enzyme activity 
D) enzyme denaturation 
A) increased enzyme activity 
B) decreased enzyme activity 
C) no change in enzyme activity 
D) enzyme denaturation

Question 2

Which of the following statements about ATP hydrolysis is false?

Accepted Answer

A) The bonds between the phosphates in ATP are high-energy bonds. 
B) A large amount of free energy is released as a result of ATP hydrolysis. 
C) ATP hydrolysis has a $\Delta$G of 7.3 kcal/mol. 
D) The bonds between the phosphates in ATP are unstable. 
A) The bonds between the phosphates in ATP are high-energy bonds. 
B) A large amount of free energy is released as a result of ATP hydrolysis. 
C) ATP hydrolysis has a $\Delta$G of 7.3 kcal/mol. 
D) The bonds between the phosphates in ATP are unstable.

Question 3

As energy is being reconverted through the many forms,it is continuously lost as

Accepted Answer

A) electricity. 
B) light. 
C) sound. 
D) heat. 
E) chemical energy. 
A) electricity. 
B) light. 
C) sound. 
D) heat. 
E) chemical energy.

Question 4

A chemical reaction in which the products contain less energy than the _______ will tend to proceed spontaneously.

Accepted Answer

A) reactants 
B) enzymes 
C) coenzymes 
D) substrates 
E) cofactors 
A) reactants 
B) enzymes 
C) coenzymes 
D) substrates 
E) cofactors

Question 5

Which of the following statements about the equilibrium constant of a chemical reaction is false?

Accepted Answer

A) The equilibrium constant depends on the concentrations of the reactants and products. 
B) An endergonic reaction has an equilibrium constant that favors the products. 
C) The equilibrium constant of a reaction is influenced by temperature. 
D) The equilibrium constant of a reaction has a numerical value. 
A) The equilibrium constant depends on the concentrations of the reactants and products. 
B) An endergonic reaction has an equilibrium constant that favors the products. 
C) The equilibrium constant of a reaction is influenced by temperature. 
D) The equilibrium constant of a reaction has a numerical value.

Question 6

RNA molecules that have been recently reported to act also as enzymes are given the name

Accepted Answer

A) ribozymes. 
B) deoxyribozymes. 
C) chromosomes. 
D) coenzymes. 
E) metalloenzymes. 
A) ribozymes. 
B) deoxyribozymes. 
C) chromosomes. 
D) coenzymes. 
E) metalloenzymes.

Question 7

The process of influencing the chemical bonds in a way that lowers the __________ needed to speed up a chemical reaction is called catalysis.

Accepted Answer

A) heat energy 
B) free energy 
C) activation energy 
D) enzyme 
A) heat energy 
B) free energy 
C) activation energy 
D) enzyme

Question 8

The inorganic non-protein components that participate in enzyme catalysis are known as

Accepted Answer

A) coenzymes. 
B) cofactors. 
C) end-products. 
D) substrates. 
E) reactants. 
A) coenzymes. 
B) cofactors. 
C) end-products. 
D) substrates. 
E) reactants.

Exam 6: Energy and Metabolism

The temperature is raised slightly above the optimum for a specific enzyme.What would you expect to observe as a result of the change in temperature?

Which of the following statements about ATP hydrolysis is false?

As energy is being reconverted through the many forms,it is continuously lost as

A chemical reaction in which the products contain less energy than the _______ will tend to proceed spontaneously.

Which of the following statements about the equilibrium constant of a chemical reaction is false?

RNA molecules that have been recently reported to act also as enzymes are given the name

The process of influencing the chemical bonds in a way that lowers the __________ needed to speed up a chemical reaction is called catalysis.

The inorganic non-protein components that participate in enzyme catalysis are known as

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