AP Biology Practice Test 6

Test Information

Question 12 questions

Time 15 minutes

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Questions 1-2 refer to the following information.

A scientist studies the storage and distribution of oxygen in humans and Weddell seals to examine the physiological adaptations that permit seals to descend to great depths and stay submerged for extended periods. The figure below depicts the oxygen storage in both organisms.

1. Compared with humans, approximately how many liters of oxygen does the Weddell seal store per kilogram of body weight?

2. During a dive, a Weddell seal's blood flow to the abdominal organs is shut off and oxygen-rich blood is diverted to the eyes, brain, and spinal cord. Which of the following is the most likely reason for this adaptation?

3. In general, animal cells differ from plant cells in that animal cells have

4. A cell from the leaf of the aquatic plant Elodea was soaked in a 15 percent sugar solution, and its contents soon separated from the cell wall and formed a mass in the center of the cell. All of the following statements are true about this event EXCEPT

5. A chemical agent is found to denature all enzymes in the synaptic cleft. What effect will this agent have on acetylcholine?

6. The base composition of DNA varies from one species to another. Which of the following ratios would you expect to remain constant in the DNA?

7. In reptile eggs, the extraembryonic membrane that functions in excretion and respiration is the

8. Consider the following enzyme pathway:

An increase in substance F leads to the inhibition of enzyme 3. All of the following are results of the process EXCEPT

9. The liver is a vital organ that performs all of the following functions EXCEPT

10. The graph above shows the oxygen dissociation curves of maternal hemoglobin and fetal hemoglobin. Based on the graph, it can be concluded that

11. In minks, the gene for brown fur (B) is dominant over the gene for silver fur (b). Which set of genotypes represents a cross that could produce offspring with silver fur from parents that both have brown fur?

12. Hemoglobin is a molecule that binds to both O2 and CO2. There is an allosteric relationship between the concentrations of O2 and CO2. Hemoglobin's affinity for O2