Chapter 8 Intro to Metabolism Practice Test Questions With Complete Solutions

Which of the following answer choices includes the proper terms to metabolically describe the process of digesting lactose? correct answer: It is a catabolic process with an exergonic reaction that results in an output of energy. Why do you, as a living organism, need to continually consume food? correct answer: Food is broken down by catabolic pathways and converted to ATP, which is then used to fuel anabolic pathways. A+B+C+energy⟶ABC Which best describes the reaction above? a. It is an anabolic reaction. b. It illustrates cellular respiration c. it is a catabolic reaction d. it is an exergonic reaction correct answer: a. It is an anabolic reaction. AB⟶A+B+energy Which best describes the reaction above? correct answer: It is a catabolic reaction. Amylase is an enzyme found in saliva that breaks down starch.The enzyme is currently functioning at its optimal pH of 7 and optimal temperature of 32∘C. Which of the following could result in an increase in the reaction rate? a. Increasing substrate concentration. b. Providing an environment with a pH of 9 c. Decreasing enzyme concentration d. Placing the reactants in an environment at 10 degrees C correct answer: a. Increasing substrate concentration. (Increasing substrate concentration could increase the rate of the reaction, as there would be more substrate to bind with the enzyme.) Pepsin is an enzyme found in the human stomach that breaks down protein. Pepsin will not break down starch. Which statement best explains this observation? correct answer: Enzymes only work for specific substrates. (Each type of enzyme typically only reacts with one, or a couple, of substrates. Pepsin is an enzy