AP Bio Test Unit 3 Questions and
Answers8
Energy released by the electron transport chain is used to pump H+ ions into which location? -
ANSWERS -mitochondrial intermembrane space
Each time a molecule of glucose (C6H12O6 ) is completely oxidized via aerobic respiration, how
many
oxygen molecules (O2 ) are required? - ANSWERS -6
Which of the following are products of the light reactions of photosynthesis that are utilized in
the Calvin
cycle? - ANSWERS -ATP and NADPH
What does the chemiosmotic process in chloroplasts involve? - ANSWERS -A) establishment of a
proton gradient
In glycolysis, for each molecule of glucose oxidized to pyruvate - ANSWERS -B) 2 molecules of
ATP are used and 4 molecules of ATP are produced.
In chemiosmotic phosphorylation, what is the most direct source of energy that is used to
convert ADP + Pi to ATP? - ANSWERS -D) energy released from movement of protons through
ATP synthase
Which statement describes the functioning of photosystem II? - ANSWERS -D) The electron
vacancies in P680 are filled by electrons derived from water.
, The primary role of oxygen in cellular respiration is to - ANSWERS -B) act as an acceptor for
electrons and hydrogen, forming water.
During aerobic respiration, which of the following directly donates electrons to the electron
transport chain at the lowest energy level? - ANSWERS -E) FADH2
Which of the following is likely to lead to an increase in the concentration of ATP in a cell? -
ANSWERS -B) an increase in a cell's catabolic activity
What wavelength of light in the figure is most effective in driving photosynthesis? - ANSWERS -
A) 420 mm
Figure 10.1 shows the absorption spectrum for chlorophyll a and the action spectrum for
photosynthesis. Why are they different? - ANSWERS -D) Other pigments absorb light in addition
to chlorophyll a.
The oxygen consumed during cellular respiration is involved directly in which process or event? -
ANSWERS -B) accepting electrons at the end of the electron transport chain
In a plant cell, where are the ATP synthase complexes located? - ANSWERS -D) A and
C....thylakoid membrane & plasma membrane
Where does the Calvin cycle take place? - ANSWERS -A) stroma of the chloroplast
Photorespiration lowers the efficiency of photosynthesis by preventing the formation of -
ANSWERS -B) 3-phosphoglycerate molecules
Which metabolic pathway is common to both cellular respiration and fermentation? - ANSWERS
-D) glycolysis
Answers8
Energy released by the electron transport chain is used to pump H+ ions into which location? -
ANSWERS -mitochondrial intermembrane space
Each time a molecule of glucose (C6H12O6 ) is completely oxidized via aerobic respiration, how
many
oxygen molecules (O2 ) are required? - ANSWERS -6
Which of the following are products of the light reactions of photosynthesis that are utilized in
the Calvin
cycle? - ANSWERS -ATP and NADPH
What does the chemiosmotic process in chloroplasts involve? - ANSWERS -A) establishment of a
proton gradient
In glycolysis, for each molecule of glucose oxidized to pyruvate - ANSWERS -B) 2 molecules of
ATP are used and 4 molecules of ATP are produced.
In chemiosmotic phosphorylation, what is the most direct source of energy that is used to
convert ADP + Pi to ATP? - ANSWERS -D) energy released from movement of protons through
ATP synthase
Which statement describes the functioning of photosystem II? - ANSWERS -D) The electron
vacancies in P680 are filled by electrons derived from water.
, The primary role of oxygen in cellular respiration is to - ANSWERS -B) act as an acceptor for
electrons and hydrogen, forming water.
During aerobic respiration, which of the following directly donates electrons to the electron
transport chain at the lowest energy level? - ANSWERS -E) FADH2
Which of the following is likely to lead to an increase in the concentration of ATP in a cell? -
ANSWERS -B) an increase in a cell's catabolic activity
What wavelength of light in the figure is most effective in driving photosynthesis? - ANSWERS -
A) 420 mm
Figure 10.1 shows the absorption spectrum for chlorophyll a and the action spectrum for
photosynthesis. Why are they different? - ANSWERS -D) Other pigments absorb light in addition
to chlorophyll a.
The oxygen consumed during cellular respiration is involved directly in which process or event? -
ANSWERS -B) accepting electrons at the end of the electron transport chain
In a plant cell, where are the ATP synthase complexes located? - ANSWERS -D) A and
C....thylakoid membrane & plasma membrane
Where does the Calvin cycle take place? - ANSWERS -A) stroma of the chloroplast
Photorespiration lowers the efficiency of photosynthesis by preventing the formation of -
ANSWERS -B) 3-phosphoglycerate molecules
Which metabolic pathway is common to both cellular respiration and fermentation? - ANSWERS
-D) glycolysis
