Exam 8: An Introduction to Metabolism

The following questions are based on the reaction A + B → C + D shown in Figure 8.2. -Which of the following would be the same in an enzyme-catalyzed or noncatalyzed reaction?

Refer to Figure 8.1 to answer the following questions. -Which curve was most likely generated from analysis of an enzyme from a human stomach where conditions are strongly acid?

What is the change in free energy of a system at chemical equilibrium?

The active site of an enzyme is the region that

A number of systems for pumping across membranes are powered by ATP. Such ATP-powered pumps are often called ATPases although they don't often hydrolyze ATP unless they are simultaneously transporting ions. Small increases in calcium ions in the cytosol trigger a number of different intracellular reactions, so the cells must keep the calcium concentration quite low. Muscle cells also transport calcium from the cytosol into the membranous system called the sarcoplasmic reticulum (SR). If a muscle cell cytosol has a free calcium ion concentration of 10-⁷ in a resting cell, while the concentration in the SR can be 10-², then how is the ATPase acting?

Which of the following is an example of potential rather than kinetic energy?

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

Which term most precisely describes the cellular process of breaking down large molecules into smaller ones?

According to the induced fit hypothesis of enzyme catalysis, which of the following is correct?

A chemical reaction that has a positive △G is correctly described as

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

During a laboratory experiment, you discover that an enzyme-catalyzed reaction has a △G of -20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the △G for the new reaction?

Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier known as the reaction's

Which of the following is True of enzymes?

When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?

Using a series of arrows, draw the branched metabolic reaction pathway described by the following statements, then answer the question at the end. ∙ L can form either M or N. ∙ M can form O. ∙ O can form either P or R. ∙ P can form Q. ∙ R can form S. ∙ O inhibits the reaction of L to form M. ∙ Q inhibits the reaction of O to form P. ∙ S inhibits the reaction of O to form R. Which reaction would prevail if both Q and S were present in the cell in high concentrations?

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 (are)True about enzyme-catalyzed reactions?

Which of the following is an example of cooperativity?

The following questions are based on the reaction A + B → C + D shown in Figure 8.2. -Substance A functions as