AP Biology Benchmark #7 Enzymes & ATP

1

Which of the following statements describes a common characteristic of catabolic pathways?

1

What environmental condition typically increases the rate of enzyme activity?

1

When ATP releases some energy, it also releases inorganic phosphate. What happens to the inorganic phosphate in the cell?

1

Which of the following statements describes a key component of the induced fit hypothesis of enzyme catalysis?

Use the following information to answer questions #

Rate of an enzyme-catalyzed reaction as a function of varying reactant concentration, with the concentration of enzyme constant.

1

Use the following information to answer the question below.

Activity of various enzymes at various temperatures (a) and at various pH (b)

1

A series of enzymes catalyze the reactions in the metabolic pathway X → Y → Z → A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme.

1

What is substance X?

In a metabolic pathway, succinate dehydrogenase catalyzes the conversion of succinate to fumarate. The reaction is inhibited by malonic acid, a substance that resembles succinate but cannot be acted upon by succinate dehydrogenase. Increasing the amount of succinate molecules to those of malonic acid reduces the inhibitory effect of malonic acid. 

1

This is a model of a metabolic pathway involving molecules 1 - 6 and enzymes A - E.

4

Describe what is occurring in the red box (outlined not shaded box) and explain its role in this metabolic pathway.

4

Imagine a medical condition that denatured Enzyme C. Predict how that would affect the concentrations of molecule 1 and molecule 2, if this were a closed system. Explain your answers for each.

3

This model demonstrates feedback inhibition of an anabolic pathway. With that in mind, explain how ATP might be involved in feedback inhibition of a catabolic pathway. Explain your answer.

This is a graph of an enzyme mediated reaction.

7

Explain the molecular events occurring at EACH stage of this reaction profile. Be clear about how the events of each stage are different from the other. Use appropriate vocabulary.

1

Assume that the graphed reaction is occurring at optimal temperature and pH. Describe how the graph would change if the pH were to change.

4

Explain your previous answer detailing specific, physical changes to the participants of the reaction and describing the results of these changes.

2

Some people argue that biochemical pathways are too complex to have evolved because all intermediate steps in a given pathway must be present to produce the final product. Critique this argument.

AP Biology Benchmark #7 Enzymes & ATP

Which of the following statements describes a common characteristic of catabolic pathways?

What environmental condition typically increases the rate of enzyme activity?

When ATP releases some energy, it also releases inorganic phosphate. What happens to the inorganic phosphate in the cell?

Which of the following statements describes a key component of the induced fit hypothesis of enzyme catalysis?

What is substance X?

Describe what is occurring in the red box (outlined not shaded box) and explain its role in this metabolic pathway.

Imagine a medical condition that denatured Enzyme C. Predict how that would affect the concentrations of molecule 1 and molecule 2, if this were a closed system. Explain your answers for each.

This model demonstrates feedback inhibition of an anabolic pathway. With that in mind, explain how ATP might be involved in feedback inhibition of a catabolic pathway. Explain your answer.

Explain the molecular events occurring at EACH stage of this reaction profile. Be clear about how the events of each stage are different from the other. Use appropriate vocabulary.

Assume that the graphed reaction is occurring at optimal temperature and pH. Describe how the graph would change if the pH were to change.

Explain your previous answer detailing specific, physical changes to the participants of the reaction and describing the results of these changes.

Some people argue that biochemical pathways are too complex to have evolved because all intermediate steps in a given pathway must be present to produce the final product. Critique this argument.

Which of the following statements describes a common characteristic of catabolic pathways?

What environmental condition typically increases the rate of enzyme activity?

When ATP releases some energy, it also releases inorganic phosphate. What happens to the inorganic phosphate in the cell?

Which of the following is the most correct interpretation of the figure?

How do cells use the ATP cycle illustrated in the figure?

Which of the following statements describes a key component of the induced fit hypothesis of enzyme catalysis?

For the enzyme-catalyzed reaction shown in the figure, if the initial reactant concentration is 1.0 micromolar, which of these treatments will cause the greatest increase in the rate of the reaction?

Which temperature and pH profile curves on the graphs are most likely associated with an enzyme isolated from a human stomach where conditions are strongly acid?

With respect to the enzyme that converts X to Y, substance A functions as ________.

What is substance X?

Select the correct identification of the molecules described in the reaction.

What role does malonic acid play with respect to succinate dehydrogenase?

Describe what is occurring in the red box (outlined not shaded box) and explain its role in this metabolic pathway.

Imagine a medical condition that denatured Enzyme C. Predict how that would affect the concentrations of molecule 1 and molecule 2, if this were a closed system. Explain your answers for each.

This model demonstrates feedback inhibition of an anabolic pathway. With that in mind, explain how ATP might be involved in feedback inhibition of a catabolic pathway. Explain your answer.

Explain the molecular events occurring at EACH stage of this reaction profile. Be clear about how the events of each stage are different from the other. Use appropriate vocabulary.

Assume that the graphed reaction is occurring at optimal temperature and pH. Describe how the graph would change if the pH were to change.

Explain your previous answer detailing specific, physical changes to the participants of the reaction and describing the results of these changes.

Some people argue that biochemical pathways are too complex to have evolved because all intermediate steps in a given pathway must be present to produce the final product. Critique this argument.

Which of the following is the most correct interpretation of the figure?

How do cells use the ATP cycle illustrated in the figure?

For the enzyme-catalyzed reaction shown in the figure, if the initial reactant concentration is 1.0 micromolar, which of these treatments will cause the greatest increase in the rate of the reaction?

Which temperature and pH profile curves on the graphs are most likely associated with an enzyme isolated from a human stomach where conditions are strongly acid?

With respect to the enzyme that converts X to Y, substance A functions as ________.

Select the correct identification of the molecules described in the reaction.

What role does malonic acid play with respect to succinate dehydrogenase?