AP Biology MCQ Practice Exam #1 (Answered 100% Correctly) 2024

AP Biology MCQ Practice Exam #1 (Answered 100% Correctly) 2024 Humans produce sweat as a cooling mechanism to maintain a stable internal temperature. Which of the following best expalins how the properties of water contribute to this physiological process? The high heat of vaporization of water allows the body to remove excess heat through a phase change of water from liquid to gas. A student placed a semipermeable membrane inside a U-shaped channel with two chambers. Membrane permits the movement of water but not salt. The student wants to vary the rate of osmosis that occurs across the membrane. Which experimental design will result in the fastest net rate of water movement into chamber A? Placing salt in chamber A and distilled water in chamber B. What best describes the role of water in photosynthesis? Water molecules donate electrons to the electron transport chain. What evolutionary advantage does compartmentalization of core metabolic processes offer eukaryotes? Evolution of a nucleus in eukaryotes separates the processes of transcription and translation and they can be regulated separately. Pyruvate dehydrogenase is an enzyme that converts pyruvate to acetyl-CoA. Acetyl-CoA is further metabolized in the Krebs cycle. A researcher measured the accumulation of acetyl-CoA in a reaction containing pyruvate and pyruvate dehydrogenase under several different conditions 5. Which of the following best describes the cellular location where pyruvate dehydrogenase is most likely active? 6. The maximum production rate of acetyl-CoA under condition 1 is closer to which of the following? 7. Which of the following observations provides the best evidence that acetyl-CoA negatively regulates pyruvate dehydrogenase activity? 8. Which of the following best explains the buildup of lactic acid in individuals with the mutation?