Exam 8: An Introduction to Metabolism

When 10,000 molecules of ATP are hydrolyzed to ADP and Pi in a test tube, about twice as much heat is liberated as when a cell hydrolyzes the same amount of ATP. Which of the following is the best explanation for this observation?

Which of the following is most similar in structure to ATP?

Use Figure 8.3 to answer the following questions. -In coupled reactions, in which direction would the endergonic reaction be driven relative to the clockwise direction of the ATP reaction above and shown in the figure?

The following questions are based on the reaction A + B → C + D shown in Figure 8.2. -Which of the following bests describes the reaction?

Some bacteria are metabolically active in hot springs because

Besides turning enzymes on or off, what other means does a cell use to control enzymatic activity?

When ATP releases some energy, it also releases inorganic phosphate. What purpose does this serve (if any)in the cell?

Why is ATP an important molecule in metabolism?

The following questions are based on the reaction A + B → C + D shown in Figure 8.2. -Which of the following represents the △G of the reaction?

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 based on the reaction A + B → C + D shown in Figure 8.2. -How does a noncompetitive inhibitor decrease the rate of an enzyme reaction?

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following?

Zinc, an essential trace element for most organisms, is present in the active site of the enzyme carboxypeptidase. The zinc most likely functions as a(n)

If an enzyme solution is saturated with substrate, the most effective way to obtain a faster yield of products is to

Which of the following statements is True concerning catabolic pathways?

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

Refer to Figure 8.1 to answer the following questions. -Which curve was most likely generated from an enzyme that requires a cofactor?

Most cells cannot harness heat to perform work because

The following questions are based on the reaction A + B → C + D shown in Figure 8.2. -Which of the following represents the activation energy required for a noncatalyzed reaction?

Use the following information to answer the following questions. 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. -Based on this information, which of the following is correct?