Exam 8: An Introduction to Metabolism

Use the following information to answer the questions below. 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?

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

Use the following information to answer the questions below. A patient comes into the emergency room having accidentally ingested methanol (a component in anti-freeze). Methanol toxicity can lead to blindness, neurological issues, or death and must be treated quickly. Methanol is oxidized by the enzyme alcohol dehydrogenase (ADH) to produce formaldehyde which is then converted to formic acid. ADH has a higher affinity to ethanol, where it functions to oxidize ethanol into acetaldehyde with the end product of the pathway being acetic acid (vinegar). -This treatment functions under the principle of

The following questions are based on the reaction A + B ↔ C + D shown in the figure below. -Which of the following represents the activation energy needed for the noncatalyzed reverse reaction, C + D → A + B, in the figure above?

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

Most cells cannot harness heat to perform work because

Use the following figure to answer the questions below. Rate of an enzyme-catalyzed reaction as a function of varying reactant concentration, with the concentration of enzyme constant. -For the enzyme-catalyzed reaction shown in the figure, which of these treatments will cause the greatest increase in the rate of the reaction, if the initial reactant concentration is 1.0 micromolar?

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