Questions and Answers
Photosynthesis occurs in?
chloroplasts
Chloroplasts contain ______ that stack up to form grana.
thylakoids
Chloroplasts contain a fluid space called?
stroma
Photosynthesis provides energy for?
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Sunlight is a type of?
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Photosynthesis has two pathways?
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The first pathway in photosynthesis are?
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Light reactions require?
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Light reactions produce?
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The oxygen produced in light reactions is?
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Light reactions occur in?
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Light reactions use?
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The pigments/chlorophyll in light reactions are found in the?
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The second pathway in photosynthesis is the?
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The Calvin Cycle has ____ steps.
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What is the first step of the Calvin Cycle?
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Carbon fixation uses the enzyme?
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What occurs in carbon fixation?
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What is the second step of the Calvin Cycle?
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Reduction and carbohydrate production produces?
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What is the third step of the Calvin Cycle?
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The regeneration phase restores?
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Study Notes
Photosynthesis Overview
- Photosynthesis occurs specifically in chloroplasts, the organelles responsible for converting light energy into chemical energy.
Chloroplast Structure
- Chloroplasts contain thylakoids, which are membrane-bound structures that stack to form grana.
- The fluid space surrounding thylakoids in chloroplasts is known as stroma.
Sunlight and Energy
- Photosynthesis is driven by sunlight, a type of electromagnetic radiation essential for this process.
Process of Photosynthesis
- Photosynthesis involves two main pathways: light reactions and the Calvin Cycle.
Light Reactions
- Light reactions, the first pathway in photosynthesis, require light and water to function.
- These reactions occur within photosystems, utilizing pigments such as chlorophyll found in the thylakoid membrane.
- Light reactions produce ATP, NADPH, and oxygen, with oxygen being released into the atmosphere as a byproduct.
The Calvin Cycle
- The second pathway in photosynthesis is the Calvin Cycle, which consists of three main steps:
Steps of the Calvin Cycle
- Carbon Fixation: The first step involves incorporating CO2 into an organic compound using the enzyme rubisco.
- Reduction and Carbohydrate Production: The second step produces two G3P molecules for every six molecules of CO2 processed.
- Regeneration Phase: The final step restores the initial compound necessary to continue the cycle.
Key Points of the Calvin Cycle
- Each step of the Calvin Cycle plays a crucial role in synthesizing organic molecules from carbon dioxide, facilitating plant growth and energy storage.
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Description
Test your knowledge on the process of photosynthesis, including the roles of chloroplasts, thylakoids, and sunlight. This quiz covers key aspects such as light reactions and the Calvin Cycle to deepen your understanding of plant biology.
