Exam 8: An Introduction to Metabolism

Rate of an enzyme-catalyzed reaction as a function of varying reactant concentration, with the concentration of enzyme constant. -In the figure, why does the reaction rate plateau at higher reactant concentrations?

Allosteric enzyme regulation is usually associated with

The active site of an enzyme is the region that

When you have a severe fever, what grave consequence may occur if the fever is not controlled?

When glucose monomers are joined together by glycosidic linkages to form a cellulose polymer, the changes in free energy, total energy, and entropy are as follows:

The following questions are from the end-of-chapter "Test Your Understanding" section in Chapter 8 of the textbook. -If an enzyme in solution is saturated with substrate, the most effective way to obtain a faster yield of products is to

Which of the following is true for all exergonic reactions?

Protein kinases are enzymes that transfer the terminal phosphate from ATP to an amino acid residue on the target protein. Many are located on the plasma membrane as integral membrane proteins or peripheral membrane proteins. What purpose may be served by their plasma membrane localization?

The following questions are from the end-of-chapter "Test Your Understanding" section in Chapter 8 of the textbook. -If an enzyme is added to a solution where its substrate and product are in equilibrium, what will occur?

The following questions are based on the reaction A + B ↔ C + D shown in Figure 8.1. Figure 8.1 -Which of the following terms best describes the forward reaction in Figure 8.1?

Succinate dehydrogenase catalyzes the conversion of succinate to fumarate. The reaction is inhibited by malonic acid, which resembles succinate but cannot be acted upon by succinate dehydrogenase. Increasing the ratio of succinate to malonic acid reduces the inhibitory effect of malonic acid. -What is malonic acid's role with respect to succinate dehydrogenase?

The mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathway is most precisely described as

Protein kinases are enzymes that catalyze phosphorylation of target proteins at specific sites, whereas protein phosphatases catalyze removal of phosphate(s)from phosphorylated proteins. Phosphorylation and dephosphorylation can function as an on-off switch for a protein's activity, most likely through

The following questions are based on the reaction A + B ↔ C + D shown in Figure 8.1. Figure 8.1 -Which of the following represents the ΔG of the reaction in Figure 8.1?

Activity of various enzymes at various temperatures (a) and at various pH (b). -Which temperature and pH profile curves on the graphs were most likely generated from analysis of an enzyme from a human stomach where conditions are strongly acid?

Which of the following types of reactions would decrease the entropy within a cell?

Which of the following is (are)true for anabolic pathways?

A solution of starch at room temperature does not readily decompose to form a solution of simple sugars because

Which of the following statements is representative of the second law of thermodynamics?

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