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Questions and Answers
In photosynthesis, what is the product that is made by the Calvin Cycle?
In photosynthesis, what is the product that is made by the Calvin Cycle?
Water is ________ in photosynthesis, which means it ________ electrons.
Water is ________ in photosynthesis, which means it ________ electrons.
What is the main function of the light-dependent reactions in photosynthesis?
What is the main function of the light-dependent reactions in photosynthesis?
What is the name of the molecule to which carbon dioxide is fixed in the Calvin Cycle?
What is the name of the molecule to which carbon dioxide is fixed in the Calvin Cycle?
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What is the main function of the electron transport chain (ETC) in photosynthesis?
What is the main function of the electron transport chain (ETC) in photosynthesis?
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The Calvin Cycle is light-dependent because it requires light energy to function.
The Calvin Cycle is light-dependent because it requires light energy to function.
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What is the primary difference between cellular respiration and photosynthesis?
What is the primary difference between cellular respiration and photosynthesis?
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Both photosynthesis and cellular respiration use electron carriers to move electrons.
Both photosynthesis and cellular respiration use electron carriers to move electrons.
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Photosynthesis does not occur in organisms without chlorophyll.
Photosynthesis does not occur in organisms without chlorophyll.
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What is the main product of photosynthesis?
What is the main product of photosynthesis?
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Study Notes
Photosynthesis
- Carbon dioxide + water + light energy → glucose precursor + oxygen
- Carbon dioxide is reduced (gain electrons)
- Water is oxidized (loses electrons) to oxygen
- Two stages: light-dependent and Calvin cycle
- Light-dependent reactions require light, produce ATP and NADPH
- Calvin cycle uses ATP and NADPH from light-dependent reactions to make glucose precursor
Cellular Respiration vs. Photosynthesis
- Similarities: use electron carriers (ETC) to move electrons
- Differences:
- Photosynthesis occurs in chloroplasts
- Chloroplasts contain photosynthetic pigments (chlorophyll) capturing light energy
- Chlorophyll gives plants their green color. Plants lacking chlorophyll are white and cannot photosynthesize.
- Cellular respiration vs. photosynthesis happens in different locations (mitochondria and chloroplasts)
Light-Dependent Reactions
- Inputs: ADP + Pi, NADP+, H₂O
- Outputs: ATP, NADPH, O₂
- Two photosystems (PSII and PSI)
- Water splitting provides electrons to PSII
- Light energy increases electron energy levels
- Electron transport chain (ETC) moves electrons from PSII to PSI
- Proton gradient drives ATP synthesis (chemiosmosis)
- Light energy increases electron energy levels in PSI
- Electrons reduce NADP+ to NADPH
Calvin Cycle
- Inputs: ATP, NADPH, CO₂
- Outputs: ADP, NADP+, glucose precursor (G3P)
- Carbon fixation: CO₂ combines with RuBP using Rubisco
- Reduction: ATP and NADPH used to create G3P
- Regeneration: RuBP is regenerated to continue the cycle
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Description
Explore the processes of photosynthesis and cellular respiration through this quiz. Learn about the light-dependent reactions, the Calvin cycle, and compare the similarities and differences between photosynthesis and cellular respiration. Test your understanding of the functions of chloroplasts and mitochondria!
