Chapter 06 – Energy and Metabolism
36. In an experiment described in a chemistry lab book, the directions state that after mixing
two chemicals (A and B) and waiting 5 minutes that A will be oxidized. This means that:
37. In a chemical reaction, glyceraldehyde-3-phosphate + NAD+ yields 1,3-
bisphosphoglycerate + NADH. In this reaction, what happened to NAD+?
Chapter 06 – Energy and Metabolism
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about oxidation and reduction chemical reactions? What other
information is related to the question?
Choose Answer
Do you have all the information needed to determine the correct answer?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 06 – Energy and Metabolism
38. In a chemical reaction, 1,3-bisphosphoglycerate + ADP yields 3-phosphoglycerate plus
ATP. What is the delta G for this reaction?
Chapter 06 – Energy and Metabolism
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about free energy in enzymatic reactions? What other
information is related to the question?
Choose Answer
Do you have all the information needed to answer the question?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 06 – Energy and Metabolism
39. For a particular chemical reaction, the enthalpy of the reactants is -400 kJ. The enthalpy
of the products is -390 kJ. The entropy of the reactants is 0.2 kJ/K. The entropy of the
products is 0.3 kJ/K. The temperature of the reaction is 25 degrees Celsius. What can you
conclude about this reaction?
Chapter 06 – Energy and Metabolism
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know aboutenergy of reactants and products in a reaction? What
other information is related to the question?
Choose Answer
Do you have all the information needed to make a determination about the change in free
energy?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the
Chapter 06 – Energy and Metabolism
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
40. Does ADP contain the capacity to provide energy for the cell?
41. AMP-activated protein kinase (AMPK) is an enzyme that is activated by high levels of
AMP in cells. If levels of AMP are high in cells, that means that levels of ATP are
low. Once active, AMPK activates catabolic pathways and inhibits anabolic pathways in the
cell. Why do you think that is the case? Choose the answer that best explains the role of
AMPK.
Chapter 06 – Energy and Metabolism
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about AMP, ADP, and ATP in cells? What other information is
related to the question?
Choose Answer
Do you have all the information needed to make a determination about the change in free
energy?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 06 – Energy and Metabolism
42. You are studying an enzyme-catalyzed reaction that induces a particular cellular activity
in the lab. If you wanted to slow down that particular cellular activity by controlling the
enzyme, what could you do?
43. A new antibiotic has been developed that inhibits the activity of an enzyme by
competitive inhibition. What effect will this have on the activation energy of the enzyme-
catalyzed reaction?
Chapter 06 – Energy and Metabolism
Clarify Question
What is the key concept addressed by the question?
Gather Content
What do you already know about enzymes and activation energy? What factors influence
activation energy? What other information is related to the question?
Choose Answer
Do you have all necessary information to analyze how the antibiotic might influence
activation energy?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 06 – Energy and Metabolism
44. A new antibiotic has been developed. It acts as a noncompetitive inhibitor. How will this
antibiotic affect delta G for the enzyme-catalyzed reaction?
Chapter 06 – Energy and Metabolism
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about enzymes and free energy? What other information is
related to the question?
Choose Answer
Do you have all necessary information to analyze how the noncompetitive inhibitor might
influence free energy?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 06 – Energy and Metabolism
45. Glycolysis is a metabolic process that is done by all cells. However, not all cells make
use of another metabolic process called the Krebs cycle. What does this tell you about the
evolution of these processes?