Transcript October 17 AP Biology - John D. O`Bryant School of Math & Science

AP Biology
John D. O’Bryant School of
Mathematics and Science
October 17, 2012
AP Biology
Agenda
 Do Now (Quiz)
 Cellular Respiration
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 1. Which of the following statements describes NAD+?
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A) NAD+ is reduced to NADH during both glycolysis and the
citric acid cycle.
B) NAD+ has more chemical energy than NADH.
C) NAD+ is reduced by the action of hydrogenases.
D) NAD+ can donate electrons for use in oxidative
phosphorylation.
E) In the absence of NAD+, glycolysis can still function.
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 2. The oxygen consumed during cellular respiration is
involved directly in which process or event?
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A) glycolysis
B) accepting electrons at the end of the electron transport
chain
C) the citric acid cycle
D) the oxidation of pyruvate to acetyl CoA
E) the phosphorylation of ADP to form ATP
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 3. An electron loses potential energy when it
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A) shifts to a less electronegative atom.
B) shifts to a more electronegative atom.
C) increases its kinetic energy.
D) increases its activity as an oxidizing agent.
E) attaches itself to NAD+.
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 4. Why are carbohydrates and fats considered high energy
foods?
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A) They have a lot of oxygen atoms.
B) They have no nitrogen in their makeup.
C) They can have very long carbon skeletons.
D) They have a lot of electrons associated with hydrogen.
E) They are easily reduced.
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 5. Why is glycolysis described as having an investment
phase and a payoff phase?
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A) It both splits molecules and assembles molecules.
B) It attaches and detaches phosphate groups.
C) It uses glucose and generates pyruvate.
D) It shifts molecules from cytosol to mitochondrion.
E) It uses stored ATP and then forms a net increase in ATP.
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 6. The processes of photosynthesis and cellular respiration
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are complementary. During these energy conversions,
some energy is
A) lost in the form of heat.
B) created in the form of heat.
C) used to create light.
D) destroyed when the chemical bonds of glucose are
made.
E) saved in the chemical bonds of water, CO2 and O2.
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 7. The overall equation for the cellular respiration of
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glucose is
A) C5H12O6 + 6 O2 → 5 CO2 + 6 H2O + energy.
B) 5 CO2+ 6 H2O → C5H12O6 + 6 O2 + energy.
C) C6H12O12 + 3 O2 → 6 CO2+ 6 H2O + energy.
D) C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + energy.
E) C6H12O6 + energy → 6 CO2 + 6 H2O + 6 O2 .
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Lorenzo’s Oil
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