AP Biology Questions with CORRECT Answers
Question:
After 30 minutes, which cuvette would be expected to have the highest level of
transmittance?
Answer:
Cuvette 2
Question:
Which of the following molecules is DPIP replacing in this experiment?
Answer:
NADP+
Question:
Which of the following best predicts the expected result for Cuvette 1?
Answer:
The transmittance level in cuvette 1 will remain the same over the course of the
30-minute experiment.
Question:
The percent transmittance for Cuvette 3, as measured by the spectrophotometer, are
shown in the table above. Which of the following most likely explains these results?
Answer:
These results are expected since not all of the thylakoid membranes were disrupted by
boiling nor were all of the enzymes involved denatured.
Question:
Carbon dioxide is passed into a solution of bromothymol blue indicator until the blue
acid
Answer:
turns yellow. A sprig of elodea, an aquatic plant, is then placed into this yellow solution.
After a few hours in the sunlight, the yellow solution contining the elodea turns blue.
Which of the following best represents the purpose of this experiment? To demonstrate
that carbon dioxide is used during photosynthesis
, Question:
The different isotopes of carbon do not differ appreciably in their chemical properties.
This is used in chemical and biological research, in a technique called carbon labeling:
carbon-14 atoms can be used to replace nonradioactive carbon, in order to trace
chemical and biochemical reactions involving carbon atoms from any given organic
compound. If plants are grown for several days in an atmosphere containing 14CO2 in
place of 12CO2, which of the followoing is the most likeley result?
Answer:
A large increase in 14C will occur in the starch stored in the roots.
Question:
Based on the data presented in the graph, which of the following conclusions is most
reasonable?
Answer:
The rate of photosynthesis at 660 ppm CO2 is more dependent on temperature than the
rate at 330 ppm CO2.
Question:
Which of the following is an important difference between light-dependent and
light-independent reactions of photosynthesis?
Answer:
The light-dependent reactions produce ATP and NADPH; the lightindependent reactions
use stored energy in ATP and NADPH.
Question:
A customer observes that a particular potted plant in a restaurant was bigger and
greener than other plants in the room. When asked, the owner said that he poured
leftover club soda (carbonated water) into that plant's pot every day. Which of the
following best explains how the club soda affected that plant's growth?
Answer:
The roots received more moisture, and the leaves were exposed to more CO2.
Question:
After 30 minutes, which cuvette would be expected to have the highest level of
transmittance?
Answer:
Cuvette 2
Question:
Which of the following molecules is DPIP replacing in this experiment?
Answer:
NADP+
Question:
Which of the following best predicts the expected result for Cuvette 1?
Answer:
The transmittance level in cuvette 1 will remain the same over the course of the
30-minute experiment.
Question:
The percent transmittance for Cuvette 3, as measured by the spectrophotometer, are
shown in the table above. Which of the following most likely explains these results?
Answer:
These results are expected since not all of the thylakoid membranes were disrupted by
boiling nor were all of the enzymes involved denatured.
Question:
Carbon dioxide is passed into a solution of bromothymol blue indicator until the blue
acid
Answer:
turns yellow. A sprig of elodea, an aquatic plant, is then placed into this yellow solution.
After a few hours in the sunlight, the yellow solution contining the elodea turns blue.
Which of the following best represents the purpose of this experiment? To demonstrate
that carbon dioxide is used during photosynthesis
, Question:
The different isotopes of carbon do not differ appreciably in their chemical properties.
This is used in chemical and biological research, in a technique called carbon labeling:
carbon-14 atoms can be used to replace nonradioactive carbon, in order to trace
chemical and biochemical reactions involving carbon atoms from any given organic
compound. If plants are grown for several days in an atmosphere containing 14CO2 in
place of 12CO2, which of the followoing is the most likeley result?
Answer:
A large increase in 14C will occur in the starch stored in the roots.
Question:
Based on the data presented in the graph, which of the following conclusions is most
reasonable?
Answer:
The rate of photosynthesis at 660 ppm CO2 is more dependent on temperature than the
rate at 330 ppm CO2.
Question:
Which of the following is an important difference between light-dependent and
light-independent reactions of photosynthesis?
Answer:
The light-dependent reactions produce ATP and NADPH; the lightindependent reactions
use stored energy in ATP and NADPH.
Question:
A customer observes that a particular potted plant in a restaurant was bigger and
greener than other plants in the room. When asked, the owner said that he poured
leftover club soda (carbonated water) into that plant's pot every day. Which of the
following best explains how the club soda affected that plant's growth?
Answer:
The roots received more moisture, and the leaves were exposed to more CO2.
