AP BIOLOGY EXAM PRACTICE

Section I (Multiple-Choice Questions) Time: 80 minutes 100 questions Directions: Each of the following questions or statements is followed by five possible answers or sentence completions. Choose the one best answer or sentence completion. 1. In which of the following are the nuclear activities most opposite? A. prophase and metaphase B. prophase and anaphase C. prophase and telophase D. metaphase and anaphase E. metaphase and telophase 2. A severe storm forms a new river that divides a population of mice. After 500 years, a drought causes the river to dry up, allowing the two populations of mice to mix. Mating between mice from the two populations does not yield any offspring. This is an example of A. hybridization B. adaptive radiation C. balanced polymorphism D. allopatric speciation E. sympatric speciation 3. DNA replication requires all of the following EXCEPT: A. primase B. helicase C. DNA polymerase D. topoisomerase E. small nuclear ribonucleoproteins (snRNPs) 4. A rare genetic defect is characterized by mucus accumulation in the respiratory passages and immotile, but flagellated sperm. A defect in which of the following molecules could be responsible? A. actin B. myosin C. dynein D. hemoglobin E. interferon 5. A bacteriophage is a A. virus that attacks bacteria B. bacterium that attacks viruses C. bacterium that attacks eukaryotic cells D. parasitic bacterium E. parasitic eukaryotic cell 6. All of the following are end products of the light- dependent reactions of photosynthesis EXCEPT: A. O2 B. H+ C. C6H12O6 D. ATP E. NADPH 7. A dominant trait appears in 19% of the individuals in a population that is in Hardy-Weinberg equilibrium. What percent of the population in the next generation is expected to be homozygous dominant? A. 1% B. 9% C. 18% D. 19% E. 81% GO ON TO THE NEXT PAGE 8. Elongation of cells in shoot tips of plants is promoted by A. abscisic acid B. carotene C. cytokinin D. ethylene E. auxin 9. The endosymbiotic theory for the origin of eukaryotes is supported by all of the following EXCEPT: A. Mitochondria and chloroplasts have double membranes that consist of two lipid bilayers separated by an intermembrane space. B. Mitochondria and chloroplasts both generate ATP. C. Mitochondria and chloroplasts have a single, circular DNA molecule without histones. D. Mitochondria and chloroplasts have ribosomes that more closely resemble those of bacteria than of eukaryotes. E. Mitochondria and chloroplasts divide by a process that resembles binary fission. 10. Which of the following transmits nerve impulses between neurons? A. Cholinesterase B. Acetylcholine C. K+ D. Ca2+ E. Synaptonemal complex