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Mastering Phototropism and Photoreceptors
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Mastering Phototropism and Photoreceptors

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Questions and Answers

Which type of light is the primary receptor for red and far red light?

  • Ultraviolet (UV) light
  • Red light (correct)
  • Blue light
  • Green light
  • What is the active form of phytochrome?

  • Pr
  • FR
  • Pfr (correct)
  • R
  • What is the range of lag time for phytochrome responses?

  • Hours to days
  • Milliseconds to seconds
  • Minutes to weeks (correct)
  • Seconds to hours
  • What is the main function of cryptochromes?

    <p>Absorption of blue light</p> Signup and view all the answers

    What is the change in FAD redox state that activates cryptochrome?

    <p>FADH</p> Signup and view all the answers

    What is the delay between receiving a blue light signal and seeing the maximum response?

    <p>Seconds to minutes</p> Signup and view all the answers

    What are the two general categories of phytochrome responses?

    <p>Rapid biochemical events and slower morphological changes</p> Signup and view all the answers

    What is an example of a phytochrome response?

    <p>Germination of some plant species</p> Signup and view all the answers

    What is the primary function of phototropins?

    <p>Phototropism</p> Signup and view all the answers

    Which chromophore absorbs blue light in cryptochromes?

    <p>FAD</p> Signup and view all the answers

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