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University of Texas, San Antonio BIOLOGY 1404 Lab 5 - Photosynthesis Post-Lab Assignment
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University of Texas, San Antonio BIOLOGY 1404 Lab 5 - Photosynthesis Post-Lab Assignment
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Results for the Rate of Oxygen Synthesis in ElodeaTable 1. Rate of Photosynthesis
White Light
Net photosynthesis (light) 0.05
Cellular respiration (no light) 0.01
Gross photosynthesis 0.06
(net + cellular respiration)
Rate of Photosynthesis (ml/hr) 0.36
Rate of photosynthesis (green light) x
100 50%
Rate of photosynthesis (white light)
Class Average 0.43
Rate of Photosynthesis (ml/hr)
Class Average
Rate of photosynthesis (green light) x
67%
100
Rate of photosynthesis (white light)
Question 1 Where does the oxygen come from during photosynthesis?
During photosynthesis, the oxygen comes from the splitting of water molecules.
Question 2 Why did the solution in the tubing move upward in the volumeter when exposed to light?
The solution in the tubing moved upward in the volumeter when exposed to light because
oxygen is pushing the water upward.
Question 3 Why did the solution in the tubing move downward when covered with foil?
The solution in the tubing moved doward when covered with the foil because it is only
consuming oxygen; therefore, not producing O2.
, Question 4 Do plants have mitochondria?
Yes, plants have mitochondria.
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