AP Biology Practice Test 16

Test Information

Question 12 questions

Time 15 minutes

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1. In the Tularosa Basin of New Mexico are black lava formations surrounded by light-colored sandy desert. Pocket mice inhabit both areas. Dark-colored ones inhabit the lava formations, while light-colored mice inhabit the desert. Which of the following statements is correct about this scenario?

2. What is the best explanation for the fact that tuna, sharks, and dolphins all have a similar streamlined appearance?

3. Which of the following statements is not correct about lipids?

Questions 4-5 refer to the following information.

Here is a sketch of prokaryotic DNA undergoing replication and transcription simultaneously.

4. If 1 is thymine, what is a?

5. If 4 is adenine, what is D?

6. Yeast cells carry out both aerobic and anaerobic respiration. A yeast cell that is fed on glucose is moved from an aerobic to an anaerobic environment. Which of the following statements is correct and gives the correct reason for it?

Questions 7-8 refer to the following information.

Intact chloroplasts are isolated from dark-green leaves by low-speed centrifugation and are placed into six tubes containing cold buffer. A blue dye, DPIP, which turns clear when reduced, is also added to all the tubes. Then each tube is exposed to different wavelengths of light. A measurement of the amount of decolorization is made, and the data are plotted on a graph. Although the wavelengths of light vary, the light intensity is the same.

7. Which statement below best describes the results of the experiment?

8. What is the best explanation for the results in Question 61?

9. A group of scientists wished to learn about the energy efficiency of different modes of locomotion. They studied the literature that was based on accurate measurements and produced this graph based on the data they analyzed.

Which of the following statement accurately describes what the scientists discovered?

10. Oxygen is carried in the blood by the respiratory pigment hemoglobin, which can combine loosely with four oxygen molecules to form the molecule oxyhemoglobin. To function properly, hemoglobin must bind to oxygen in the lungs and drop it off at body cells. The more easily the hemoglobin bonds to oxygen in the lungs, the more difficult for the hemoglobin to unload the oxygen at the body cells. Here is a graph showing two different saturation-dissociation curves for one type of hemoglobin at two different pH levels.

Based on your knowledge of biology and the information in this graph, which statement about the hemoglobin curves is correct?

11. The geneticist Mary Lyon hypothesized the existence of structures visible just under the nuclear membrane in mammals, which were later named Barr bodies. Which of the following statement is NOT correct about Barr bodies?

12. Energy is harvested during cellular respiration in stages. Which of the following correctly states which phase of cellular respiration harvests the most energy and the correct explanation why?