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Review of Photosynthesis quiz #1 Flashcards

Review of Photosynthesis quiz #1
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  • What are the two main stages of photosynthesis, and where does each occur within the chloroplast?
    The two main stages of photosynthesis are the light reactions, which occur in the thylakoids, and the Calvin cycle, which takes place in the stroma of the chloroplast.
  • How do the light reactions of photosynthesis contribute to the Calvin cycle?
    The light reactions produce ATP and NADPH, which provide the energy and reducing power needed for the Calvin cycle to convert carbon dioxide into glucose.
  • What is photorespiration, and how do C4 and CAM plants minimize its effects?
    Photorespiration is a process that occurs when the enzyme rubisco fixes oxygen instead of carbon dioxide, wasting energy. C4 plants minimize photorespiration by separating the light reactions and Calvin cycle into different cell types, while CAM plants fix carbon dioxide at night to reduce water loss and photorespiration.
  • What are the three phases of the Calvin cycle, and what is the main product generated?
    The three phases of the Calvin cycle are carbon fixation, reduction (G3P synthesis), and regeneration of RuBP. The main product generated is glucose.
  • What are the two main stages of photosynthesis and where does each occur within the chloroplast?
    The two main stages are the light reactions, which occur in the thylakoids, and the Calvin cycle, which takes place in the stroma of the chloroplast.
  • What are the main products of the light reactions in photosynthesis?
    The main products are ATP, NADPH, and oxygen gas.
  • How do the light reactions of photosynthesis contribute to the Calvin cycle?
    The light reactions produce ATP and NADPH, which provide the energy and reducing power needed for the Calvin cycle to convert carbon dioxide into glucose.
  • What are the three phases of the Calvin cycle and what is the main product generated?
    The three phases are carbon fixation, reduction (G3P synthesis), and regeneration of RuBP; the main product is glucose.
  • What is photorespiration and how do C4 and CAM plants minimize its effects?
    Photorespiration occurs when rubisco fixes oxygen instead of carbon dioxide, wasting energy. C4 plants separate the light reactions and Calvin cycle into different cell types, while CAM plants fix carbon dioxide at night to reduce water loss and photorespiration.
  • What role do stomata play in photosynthesis and how does their position affect the process?
    Stomata control gas exchange by opening to allow carbon dioxide in and oxygen out. When closed, they prevent water loss but also limit carbon dioxide entry, which can lead to photorespiration.