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Photosynthesis and Cellular Respiration

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Termini in questo insieme (20)

  • What is photosynthesis?

    Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water, producing oxygen as a byproduct.

  • What is the overall chemical equation for photosynthesis?

    6CO2 + 6H2O + light energy → C6H12O6 + 6O2

  • Where does photosynthesis occur in plant cells?

    Photosynthesis occurs in the chloroplasts, specifically in the thylakoid membranes and stroma.

  • What are the two main stages of photosynthesis?

    The light-dependent reactions and the Calvin cycle (light-independent reactions).

  • What happens during the light-dependent reactions?

    Light energy is captured by chlorophyll to produce ATP and NADPH, and water is split to release oxygen.

  • What is the role of the Calvin cycle?

    The Calvin cycle uses ATP and NADPH to convert CO2 into glucose through carbon fixation.

  • What is cellular respiration?

    Cellular respiration is the process by which cells break down glucose to produce ATP, using oxygen and releasing carbon dioxide and water.

  • What is the overall chemical equation for cellular respiration?

    C6H12O6 + 6O2 → 6CO2 + 6H2O + energy (ATP)

  • Where does cellular respiration occur in eukaryotic cells?

    Cellular respiration occurs mainly in the mitochondria.

  • What are the three main stages of cellular respiration?

    Glycolysis, Krebs cycle (citric acid cycle), and electron transport chain.

  • What happens during glycolysis?

    Glucose is broken down into two molecules of pyruvate, producing a small amount of ATP and NADH in the cytoplasm.

  • What is the role of the Krebs cycle?

    The Krebs cycle processes pyruvate to produce NADH, FADH2, and ATP, releasing CO2 as a byproduct.

  • What occurs in the electron transport chain?

    NADH and FADH2 donate electrons to the chain, driving ATP production and combining electrons with oxygen to form water.

  • How are photosynthesis and cellular respiration related?

    They are complementary processes: photosynthesis stores energy in glucose, while cellular respiration releases energy from glucose.

  • What molecule is the final electron acceptor in cellular respiration?

    Oxygen is the final electron acceptor, forming water.

  • Why is ATP important in cells?

    ATP is the main energy currency used to power cellular activities.

  • What pigment captures light energy in photosynthesis?

    Chlorophyll is the primary pigment that absorbs light energy.

  • What gas is released during photosynthesis?

    Oxygen (O2) is released as a byproduct when water is split.

  • What gas is consumed during cellular respiration?

    Oxygen (O2) is consumed to accept electrons in the electron transport chain.

  • What is the significance of NADH and FADH2 in cellular respiration?

    They carry high-energy electrons to the electron transport chain to help produce ATP.