Flask # 1 2 3 4 CO2 no yes no yes Light no no yes yes a. Under which of the following conditions are the cells making ATP photosynthetically? b. Under which conditions are the cells producing oxygen? c. Suppose that you turn off the CO₂ supply to Flask #2 and at the same time you turn on the light. What will happen?

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
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Author:STARR
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Chapter20: The Protists
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Problem 4CT: Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of...
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Euglena is a one celled organism (protist) that contains chloroplasts and carries out photosynthesis
in the same manner as higher plants. Suppose you have in the laboratory four flasks of Euglena
cells that are growing. You place these flasks under the following experimental conditions:
Flask #
1
2
3
4
CO₂
no
yes
no
yes
Light
no
no
yes
yes
a. Under which of the following conditions are the cells making ATP photosynthetically?
b. Under which conditions are the cells producing oxygen?
c. Suppose that you turn off the CO₂ supply to Flask #2 and at the same time you turn on the light.
What will happen?
Transcribed Image Text:Euglena is a one celled organism (protist) that contains chloroplasts and carries out photosynthesis in the same manner as higher plants. Suppose you have in the laboratory four flasks of Euglena cells that are growing. You place these flasks under the following experimental conditions: Flask # 1 2 3 4 CO₂ no yes no yes Light no no yes yes a. Under which of the following conditions are the cells making ATP photosynthetically? b. Under which conditions are the cells producing oxygen? c. Suppose that you turn off the CO₂ supply to Flask #2 and at the same time you turn on the light. What will happen?
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