AP Biology Multiple Choice Exam Questions
and Answers
A dog is following the scent of a jackrabbit. Which of the following accurately describes how the dog's
brain integrates information for smell?
A) Chemoreceptors in the brain send impulses for smell in the nasal cavity.
B) Chemoreceptor cells in the nasal cavity sends impulses to the appropriate area of the brain.
C) Chemoreceptors on epithelial cells of the tongue send hormones to the appropriate area of the
brain.
D) Receptors originating in the nose send action potentials to the motor regions of the brain.
B) Chemoreceptor cells in the nasal cavity sends impulses to the appropriate area of the brain.
Thrips are insects that feed on rose pollen. Scientists noted that the thrips population increased in the
spring and decreased dramatically during the summer. The researchers hypothesized that food
abundance was the limiting factor for the population. Which of the following types of data would be
most useful for the scientists to collect at regular intervals on a designated test plot of rose plants?
A) Amount of sunlight (hours/day)
B) Mean temperature (oC)
C) Density of rose pollen produced (g/m2)
D) Amount of pollen produced by each flower
(g/flower)
C) Density of rose pollen produced (g/m2)
If ATP breakdown (hydrolysis) is inhibited, which of the following types of movement across cell
membranes is also inhibited?
A) Movement of oxygen into a cell
B) Movement of water through aquaporins
C) Passage of a solute against its concentration
gradient
D) Facilitated diffusion of a permeable
substance
C) Passage of a solute against its concentration
We have an expert-written solution to this problem!
Undersea landslides can disrupt marine habitats by burying organisms that live on the ocean floor.
The graph above shows the size of a population of a certain organism that lives on the ocean floor.
The population was affected by a recent landslide at the time indicated on the graph. Which of the
following best predicts how the population will be affected by the landslide?
A) The surviving organisms will evolve into a new species.
B) The reduced population will likely have allelic frequencies that are different from the initial
population.
C) The population will adapt to deeper waters to avoid future landslides.
D) The reduced population will have a greater number of different genes than the initial population.
B) The reduced population will likely have allelic frequencies that are different from the initial
population.
Which of the following questions is most relevant to understanding the Calvin cycle?
A) How does chlorophyll capture light?
B) How is ATP used in the formation of 3-carbon carbohydrates?
C) How is NADP+ reduced to NADPH?
D) How is ATP produced in chemiosmosis?
B) How is ATP used in the formation of 3-carbon carbohydrates?
, We have an expert-written solution to this problem!
H+ + HCO3- <-> H20 +CO2
The equation above shows one of the reversible reactions that occur in blood. After exercise, an
athlete's blood pH has dropped below the normal level. How will normal blood pH be restored?
A) An increase in O2 concentration in the plasma will lead to an increase in H+ concentration.
B) An increase in temperature will lead to an increase in H+ concentration.
C) An increase in sweating will lead to a decrease in OH - and H+ concentration
D) An increase in breathing rate will lead to a decrease in blood CO2 and H+ concentration.
D) An increase in breathing rate will lead to a decrease in blood CO2 and H+ concentration.
A researcher is investigating the relationship between the existing species diversity in a community
and the ability of an introduced nonnative species to destabilize the community. Which of the
following graphs is most consistent with the claim that communities with high diversity are more
resistant to change than are communities with low diversity?
D)
Under which of the following conditions is the observed number of beetles per culture dish the
greatest?
A) T. confusum with parasite at 500 days
B) T. confusum without parasite at 300 days
C) T. castaneum with parasite at 100 days
D) T. castaneum with parasite at 600 days
C) T. castaneum with parasite at 100 days
The data over the duration of the experiment provide the strongest support for which of the following
conclusions regarding the effect of the parasite on Tribolium populations?
A) T. confusum is adversely affected by the parasite, while T. castaneum is not.
B) T. castaneum is adversely affected by the parasite, while T. confusum is not.
C) Both T. confusum and T. castaneum are adversely affected by the parasite.
D) Both T. confusum and T. castaneum show increased fitness in the presence of the parasite.
B) T. castaneum is adversely affected by the parasite, while T. confusum is not.
In Figure I, the difference between the two curves can best be attributed to which of the following?
A) The difference between controlled laboratory conditions and the natural environment
B) The effect of the host on its parasite
C) The influence of competition for limited
resources
D) The natural variation among populations
D) The natural variation among populations
If the experiment was continued for an additional 500 days, the population density of T. castaneum
with the parasite would most likely stabilize at a value closest to which of the following?
A) 5 beetles/culture dish
B) 10 beetles/culture dish
C) 20 beetles/culture dish
D) 25 beetles/culture dish
B) 10 beetles/culture dish
and Answers
A dog is following the scent of a jackrabbit. Which of the following accurately describes how the dog's
brain integrates information for smell?
A) Chemoreceptors in the brain send impulses for smell in the nasal cavity.
B) Chemoreceptor cells in the nasal cavity sends impulses to the appropriate area of the brain.
C) Chemoreceptors on epithelial cells of the tongue send hormones to the appropriate area of the
brain.
D) Receptors originating in the nose send action potentials to the motor regions of the brain.
B) Chemoreceptor cells in the nasal cavity sends impulses to the appropriate area of the brain.
Thrips are insects that feed on rose pollen. Scientists noted that the thrips population increased in the
spring and decreased dramatically during the summer. The researchers hypothesized that food
abundance was the limiting factor for the population. Which of the following types of data would be
most useful for the scientists to collect at regular intervals on a designated test plot of rose plants?
A) Amount of sunlight (hours/day)
B) Mean temperature (oC)
C) Density of rose pollen produced (g/m2)
D) Amount of pollen produced by each flower
(g/flower)
C) Density of rose pollen produced (g/m2)
If ATP breakdown (hydrolysis) is inhibited, which of the following types of movement across cell
membranes is also inhibited?
A) Movement of oxygen into a cell
B) Movement of water through aquaporins
C) Passage of a solute against its concentration
gradient
D) Facilitated diffusion of a permeable
substance
C) Passage of a solute against its concentration
We have an expert-written solution to this problem!
Undersea landslides can disrupt marine habitats by burying organisms that live on the ocean floor.
The graph above shows the size of a population of a certain organism that lives on the ocean floor.
The population was affected by a recent landslide at the time indicated on the graph. Which of the
following best predicts how the population will be affected by the landslide?
A) The surviving organisms will evolve into a new species.
B) The reduced population will likely have allelic frequencies that are different from the initial
population.
C) The population will adapt to deeper waters to avoid future landslides.
D) The reduced population will have a greater number of different genes than the initial population.
B) The reduced population will likely have allelic frequencies that are different from the initial
population.
Which of the following questions is most relevant to understanding the Calvin cycle?
A) How does chlorophyll capture light?
B) How is ATP used in the formation of 3-carbon carbohydrates?
C) How is NADP+ reduced to NADPH?
D) How is ATP produced in chemiosmosis?
B) How is ATP used in the formation of 3-carbon carbohydrates?
, We have an expert-written solution to this problem!
H+ + HCO3- <-> H20 +CO2
The equation above shows one of the reversible reactions that occur in blood. After exercise, an
athlete's blood pH has dropped below the normal level. How will normal blood pH be restored?
A) An increase in O2 concentration in the plasma will lead to an increase in H+ concentration.
B) An increase in temperature will lead to an increase in H+ concentration.
C) An increase in sweating will lead to a decrease in OH - and H+ concentration
D) An increase in breathing rate will lead to a decrease in blood CO2 and H+ concentration.
D) An increase in breathing rate will lead to a decrease in blood CO2 and H+ concentration.
A researcher is investigating the relationship between the existing species diversity in a community
and the ability of an introduced nonnative species to destabilize the community. Which of the
following graphs is most consistent with the claim that communities with high diversity are more
resistant to change than are communities with low diversity?
D)
Under which of the following conditions is the observed number of beetles per culture dish the
greatest?
A) T. confusum with parasite at 500 days
B) T. confusum without parasite at 300 days
C) T. castaneum with parasite at 100 days
D) T. castaneum with parasite at 600 days
C) T. castaneum with parasite at 100 days
The data over the duration of the experiment provide the strongest support for which of the following
conclusions regarding the effect of the parasite on Tribolium populations?
A) T. confusum is adversely affected by the parasite, while T. castaneum is not.
B) T. castaneum is adversely affected by the parasite, while T. confusum is not.
C) Both T. confusum and T. castaneum are adversely affected by the parasite.
D) Both T. confusum and T. castaneum show increased fitness in the presence of the parasite.
B) T. castaneum is adversely affected by the parasite, while T. confusum is not.
In Figure I, the difference between the two curves can best be attributed to which of the following?
A) The difference between controlled laboratory conditions and the natural environment
B) The effect of the host on its parasite
C) The influence of competition for limited
resources
D) The natural variation among populations
D) The natural variation among populations
If the experiment was continued for an additional 500 days, the population density of T. castaneum
with the parasite would most likely stabilize at a value closest to which of the following?
A) 5 beetles/culture dish
B) 10 beetles/culture dish
C) 20 beetles/culture dish
D) 25 beetles/culture dish
B) 10 beetles/culture dish
