AP Biology Photosynthesis and Cellular Respiration
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  • Question 1
    60 seconds
    Q. Which Process in eukaryotic cells will proceed normally whether oxygen (O2) is present or absent?
    answer choices
    electron transport
    the citric acid cycle
    oxidative phosphorylation
  • Question 2
    60 seconds
    Q. During cellular respiration, acetyl CoA accumulates in which location?
    answer choices
    Mitochondrial Matrix
    mitochondrial outer membrane
    mitochondrial inner membrane
    mitochondrial intermembrane space
  • Question 3
    60 seconds
    Q. During aerobic respiration, electrons travel downhill in which sequence?
    answer choices
    food � citric acid cycle � ATP � NAD+
    food � NADH � electron transport chain � oxygen
    glucose � pyruvate � ATP � oxygen
    glucose � ATP � electron transport chain � NADH
  • Question 4
    60 seconds
    Q. The primary role of oxygen in cellular respiration is to
    answer choices
    yield energy in the form of ATP as it is passed down the respiratory chain.
    act as an acceptor for electrons and hydrogen, forming water.
    combine with carbon, forming CO2.
    combine with lactate, forming pyruvate.
  • Question 5
    60 seconds
    Q. Which of the following occurs in the cytosol of a eukaryotic cell?
    answer choices
    glycolysis and fermentation
    citric acid cycle
    fermentation and chemiosmosis
    oxidative phosphorylation
  • Question 6
    60 seconds
    Q. The ATP made during fermentation is generated by which of the following?
    answer choices
    the electron transport chain
    substrate�level phosphorylation
    oxidative phosphorylation
  • Question 7
    60 seconds
    Q. In the absence of oxygen, yeast cells can obtain energy by fermentation, resulting in the production of
    answer choices
    ATP, CO2, and ethanol (ethyl alcohol).
    ATP, CO2, and lactate.
    ATP, NADH, and pyruvate.
    ATP, pyruvate, and oxygen.
  • Question 8
    60 seconds
    Q. Even though plants carry on photosynthesis, plant cells still use their mitochondria for oxidation of pyruvate. When and where will this occur?
    answer choices
    in photosynthetic cells in the light, while photosynthesis occurs concurrently
    in nonphotosynthesizing cells only
    in cells that are storing glucose only
    in all cells all the time
  • Question 9
    60 seconds
    Q. What carbon sources can yeast cells metabolize to make ATP from ADP under anaerobic conditions?
    answer choices
    lactic acid
  • Question 10
    60 seconds
    Q. Yeast cells that have defective mitochondria incapable of respiration will be able to grow by catabolizing which of the following carbon sources for energy?
    answer choices
    fatty acids
    glucose, proteins, and fatty acids
  • Question 11
    60 seconds
    Q. Which of the following most accurately describes what happens to the electron carriers at the ETC?
    answer choices
    Chemiosmosis is coupled with electron transfer.
    Each electron carrier alternates between being reduced and being oxidized.
    ATP is generated at each step.
    Energy of the electrons increases at each step.
  • Question 12
    60 seconds
    Q. What happens at the end of the ETC to be able to form water?
    answer choices
    2 electrons combine with a proton and a molecule of NAD+.
    2 electrons combine with a molecule of oxygen and two hydrogen atoms.
    4 electrons combine with a molecule of oxygen and 4 protons.
    4 electrons combine with four hydrogen and two oxygen atoms.
  • Question 13
    60 seconds
    Q. When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs?
    answer choices
    The pH of the matrix increases.
    ATP synthase pumps protons by active transport.
    The electrons gain free energy.
    The cytochromes phosphorylate ADP to form ATP.
  • Question 14
    60 seconds
    Q. Most CO2 from catabolism is released during
    answer choices
    the citric acid cycle.
    lactate fermentation.
    electron transport.
  • Question 15
    60 seconds
    Q. If photosynthesizing green algae are provided with CO2 containing heavy oxygen (18O), later analysis will show that all of the following molecules produced by the algae contain 18O except
    answer choices
    glyceraldehyde 3�phosphate (G3P).
  • Question 16
    60 seconds
    Q. Halobacterium has a photosynthetic membrane that is colored purple. Its photosynthetic action spectrum is exactly complementary (opposite to) the action spectrum for green plants. What wavelengths of light do the Halobacterium photosynthetic pigments absorb?
    answer choices
    red and yellow
    blue and red
    blue, green, and red
    green and yellow
  • Question 17
    60 seconds
    Q. Which statement describes the functioning of photosystem II?
    answer choices
    Light energy excites electrons in the thylakoid membrane electron transport chain.
    Photons are passed along to a reaction�center chlorophyll.
    The P680 chlorophyll donates a pair of protons to NADP+, which is thus converted to NADPH.
    The electron vacancies in P680+ are filled by electrons derived from water.
  • Question 18
    60 seconds
    Q. What are the products of linear electron flow?
    answer choices
    heat and fluorescence
    ATP and P700
    ATP and NADPH
    P700 and P680
  • Question 19
    60 seconds
    Q. Which of the following statements best describes the relationship between photosynthesis and respiration?
    answer choices
    Respiration runs the biochemical pathways of photosynthesis in reverse.
    Photosynthesis stores energy in complex organic molecules, whereas respiration releases it.
    Photosynthesis occurs only in plants and respiration occurs only in animals.
    ATP molecules are produced in photosynthesis and used up in respiration.
  • Question 20
    60 seconds
    Q. Reduction of oxygen to form water occurs during
    answer choices
    photosynthesis only.
    respiration only.
    both photosynthesis and respiration.
    neither photosynthesis nor respiration.
  • Question 21
    60 seconds
    Q. The accumulation of free oxygen in Earth's atmosphere began
    answer choices
    with the origin of life and respiratory metabolism.
    with the origin of photosynthetic bacteria that had photosystem I.
    with the origin of cyanobacteria that had both photosystem I and photosystem II.
    with the origin of chloroplasts in photosynthetic eukaryotic algae.
  • Question 22
    60 seconds
    Q. What did Engelmann conclude about the congregation of bacteria in the red and blue areas?
    answer choices
    Bacteria released excess carbon dioxide in these areas.
    Bacteria congregated in these areas due to an increase in the temperature of the red and blue light.
    Bacteria congregated in these areas because these areas had the most oxygen being released.
    Bacteria are attracted to red and blue light and thus these wavelengths are more reactive than other wavelengths.
  • Question 23
    60 seconds
    Q. Which of the following statements is a correct distinction between autotrophs and heterotrophs?
    answer choices
    Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic.
    Only heterotrophs require chemical compounds from the environment.
    Cellular respiration is unique to heterotrophs.
    Only heterotrophs have mitochondria.
  • Question 24
    60 seconds
    Q. Which of the following does not occur during the Calvin cycle?
    answer choices
    carbon fixation
    oxidation of NADPH
    release of oxygen
    regeneration of the CO2 acceptor
  • Question 25
    60 seconds
    Q. In mechanism, photophosphorylation is most similar to
    answer choices
    substrate�level phosphorylation in glycolysis.
    oxidative phosphorylation in cellular respiration.
    the Calvin cycle.
    carbon fixation.
  • Question 26
    30 seconds
    Q. Oxidative phosphorylation in cellular respiration includes which of the following:
    answer choices
    calvin cycle, glycolysis
    glycolysis, citric acid cycle
    ETC, chemiosmosis
    glycolysis, calvin cycle
  • Question 27
    30 seconds
    Q. When NADH becomes NAD+ it is
    answer choices
  • Question 28
    30 seconds
    Q. What molecule is the final electron acceptor in cellular respiration?
    answer choices
  • Question 29
    30 seconds
    Q. What is the purpose of ATP synthase?
    answer choices
    to act as a protein channel and generate ATP by pumping H+ 
    to restart cellular respiration
    in place of Rubisco
    to break down ATP
  • Question 30
    30 seconds
    Q. In chemiosmosis which way do the protons get pumped through ATP synthase in photosynthesis?
    answer choices
    into the thylakoid space
    into the stroma
    into the mitochondrial matrix
    into the intermembrane space
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