Photosynthesis Energy Conversion
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Questions and Answers

In which part of the chloroplast do the light-dependent reactions take place?

  • Thylakoid membranes (correct)
  • Chloroplast envelope
  • Nucleoid
  • Stroma
  • What is the primary function of the light-dependent reactions in photosynthesis?

  • To release oxygen as a byproduct
  • To generate ATP and NADPH (correct)
  • To convert CO2 into glucose
  • To synthesize RuBP
  • What is the net result of the energy conversion process in photosynthesis?

  • Light energy is converted into heat energy
  • Chemical energy is converted into light energy
  • Light energy is converted into chemical energy stored in glucose (correct)
  • Chemical energy is converted into kinetic energy
  • What is the energy source for the light-independent reactions (Calvin Cycle)?

    <p>ATP and NADPH produced in light-dependent reactions</p> Signup and view all the answers

    What is the role of RuBisCO in the light-independent reactions (Calvin Cycle)?

    <p>To fix CO2 into organic molecules (glucose)</p> Signup and view all the answers

    Study Notes

    Energy Conversion in Photosynthesis

    Light-Dependent Reactions

    • Occur in the thylakoid membranes of chloroplasts
    • Light energy from the sun is absorbed by pigments (chlorophyll and others)
    • Energy is used to generate ATP and NADPH
    • Two stages:
      1. Light absorption and electron transfer
      2. ATP synthesis and reduction of NADP+

    Light-Independent Reactions (Calvin Cycle)

    • Occur in the stroma of chloroplasts
    • Use energy from ATP and NADPH produced in light-dependent reactions
    • Fix CO2 into organic molecules (glucose) using the enzyme RuBisCO
    • Regenerate RuBP (ribulose-1,5-bisphosphate) to continue the cycle

    Energy Conversion Summary

    • Light energy is converted into chemical energy (ATP and NADPH) in light-dependent reactions
    • Chemical energy is used to convert CO2 into glucose in light-independent reactions
    • Net result: light energy is converted into chemical energy stored in glucose

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    Description

    Learn about the energy conversion process in photosynthesis, including light-dependent and light-independent reactions, and how light energy is converted into chemical energy stored in glucose.

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