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AP Biology Warm Up Released Item
The chemical reaction for photosynthesis is 6 CO2 + 12 H2O + light energy → C6H12O6 + 6 O2 + 6 H2O. If the input water is labeled with a radioactive isotope of oxygen, 18O, then the oxygen gas released as the reaction proceeds is also labeled with 18O. Which of the following is the most likely explanation?
(A) During the light reactions of photosynthesis, water is split, the hydrogen atoms combine with the CO2, and oxygen gas is released.
(B) During the light reactions of photosynthesis, water is split, removing electrons and protons, and oxygen gas is released.
(C) During the Calvin cycle, water is split, regenerating NADPH from NADP+, and oxygen gas is released.
(D) During the Calvin cycle, water is split, the hydrogen atoms are added to intermediates of sugar synthesis, and oxygen gas is released.
1. READ STEM, PREDICT ANSWER, FIND ANSWER2. THEN WRITE WHY OTHER CHOICES ARE INCORRECT
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AP Biology1. Warm Up 52. Review for test3. Unit 3 Test4. Magic School Bus Gets Planted
AnnouncementsDue Today: Prepare for TEST!
Friday, December 21, 2012: Guest Speaker
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TEST REVIEW
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Copy Diagram into your notes
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Cellular Respiration
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A sample of human blood was placed in a test tube containing a physiological saline soluon (0.9% sodium chloride). This type of soluon is oen used intravenously to quickly rehydrate paents. A drop of the blood from the test tube was placed on a slide and red blood cells (RBCs) were observed under a microscope. Three possible outcomes are diagrammed below.
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Exit QuestionWhich molecule produces more ATP, NADH or FADH2?
Due Wednesday, December 19: Prepare for TEST and complete Study Guide!
Friday, December 21, 2012: Guest Speaker
