Exam 8: An Introduction to Metabolism

Living organisms increase in complexity as they grow, resulting in a decrease in the entropy of an organism. How does this relate to the second law of thermodynamics?

Use the following information to answer the question below. The figure illustrates the energy states associated with the reaction A + B ↔ C + D. Which of the following in the figure would be the same in either an enzyme-catalyzed or a noncatalyzed reaction?

Use the following information to answer the question below. The figure illustrates the energy states associated with the reaction A + B ↔ C + D. Which of the following represents the activation energy required for the enzyme-catalyzed reaction in the figure?

What is the name of the thermodynamic barrier that must be overcome before products are formed in a spontaneous reaction?

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

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

The relationship between catabolism and anabolism is most similar to the relationship between which of the following pairs of terms?

Use the following information to answer the question below. Activity of various enzymes at various temperatures (a) and at various pH (b) Which curves on the graphs may represent the temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot springs at temperatures of 70°C or higher?

Most cells cannot harness heat to perform work because ________.

Most cells cannot harness heat to perform work because

Which of the following conditions may be overcome by increasing the substrate concentration in an enzymatic reaction with a fixed amount of enzyme?

Which of the following characteristics is most likely to be associated with an enzyme that catalyzes two different chemical reactions?

Which of the following statements about the evolution of life on Earth, from simple prokaryote-like cells to multicellular eukaryotic organisms, is true?

Use the following information to answer the question below. 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?

Which of the following statements describes a central role that ATP plays in cellular metabolism?

Some bacteria are metabolically active in hot springs because

Which of the following statements is true of metabolism in its entirety in all organisms?

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

Which of the following is a primary function of the active site of an enzyme?

Which of the following statements is an important consequence of the first law of thermodynamics for a living organism?