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Biology Practice Test VIP Comprehensive Exam
Biology Practice Test — No single standardized national biology certification exam exists under this name; this is an original comprehensive practice set modeled on the College Board AP Biology exam format and CLEP Biology exam (115 questions, 90 min, 50% passing) — covering the canonical domains of cell biology, molecular genetics, evolution, ecology, and physiology at a college-introductory to advanced level.
29
Questions
90m
Time Limit
75.00%
To Pass
Question 1 of 29👑 VIP
A cell biologist treats cultured mammalian cells with a drug that selectively disrupts the proton gradient across the inner mitochondrial membrane. After 30 minutes, she observes that ATP synthesis has nearly halted, yet the electron transport chain continues to function. Which of the following best explains this observation?
Questions 2–29 and full explanations are VIP-exclusive.