Photosynthesis: Carbon Dioxide Enrichment and Temperature Control
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Questions and Answers

What is the relationship between incident light and CO2 fixation rates at low light intensities?

  • Logarithmic
  • Exponential
  • Linear (correct)
  • No relationship

    • At what percentage of full sunlight does light saturation occur?

  • 10% (correct)
  • 5%
  • 50%
  • 20%

    • In which type of plants is light rarely a limiting factor in nature?

  • Shade plants
  • Plants in dense forests (correct)
  • Plants in arid regions
  • Plants in direct sunlight

    • What is the optimum temperature range for photosynthesis in higher plants?

    <p>30-40°C</p> Signup and view all the answers

    Which of the following factors can limit the rate of photosynthesis at high light intensities?

    <p>CO2 concentration</p> Signup and view all the answers

    What is the primary purpose of photosynthesis in green plants?

    <p>Produce glucose and starch</p> Signup and view all the answers

    How does water stress affect photosynthesis in plants?

    <p>Reduces surface area of leaves</p> Signup and view all the answers

    In which part of the plant does photosynthesis primarily take place?

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

    How does the temperature affect photosynthesis in C3 and C4 plants differently?

    <p>C3 plants are more temperature-sensitive than C4 plants</p> Signup and view all the answers

    How does carbon dioxide enrichment impact plant growth in relation to photosynthesis?

    <p>Leads to higher yields</p> Signup and view all the answers

    Which factor indirectly influences photosynthesis by affecting stomatal behavior and leaf structure?

    <p>Water availability</p> Signup and view all the answers

    What did Calvin propose in relation to how plants convert light energy to chemical energy?

    <p>Transferring an electron in an organised array of pigment molecules</p> Signup and view all the answers

    How did Bassham study reactions in green plants regarding sugar formation?

    <p>By labelling carbon dioxide with C14</p> Signup and view all the answers

    Which pathway earned Calvin a Nobel Prize in 1961?

    <p>Mapping the pathway of carbon assimilation in photosynthesis</p> Signup and view all the answers

    What term is used to describe green plants that can make their own food through photosynthesis?

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

    In photosynthesis, where is the electron transferred according to Calvin's proposal?

    <p>In an organised array of pigment molecules</p> Signup and view all the answers

    What do all animals, including human beings, depend on plants for?

    <p>Their food</p> Signup and view all the answers

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