Photosystem II and Photosystem I
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Questions and Answers

What is the first electron donor in oxygenic photosynthesis?

  • Oxygen
  • Nitrogen
  • Carbon dioxide
  • Water (correct)

What is the main process by which plants acquire energy?

  • Respiration
  • Photosynthesis (correct)
  • Fermentation
  • Digestion

What does photosystem I (PSI) convert NADP+ into?

  • NADPH (correct)
  • O2
  • H2O
  • ATP

What does cytochrome b6f and ATP synthase produce together?

<p>ATP (D)</p> Signup and view all the answers

In non-cyclic photophosphorylation, where does cytochrome b6f pump protons from and to?

<p>From the stroma to the lumen (C)</p> Signup and view all the answers

What is the primary function of chlorophyll fluorescence in photosynthetic organisms?

<p>It is an indicator of photosynthetic energy conversion (C)</p> Signup and view all the answers

Which of the following processes does excited chlorophyll use to dissipate absorbed light energy?

<p>All of these (C)</p> Signup and view all the answers

What is the Kautsky effect?

<p>A rapid rise in fluorescence from Photosystem II (C)</p> Signup and view all the answers

Which photosystem is responsible for the variable rise in chlorophyll fluorescence?

<p>Photosystem II (A)</p> Signup and view all the answers

What type of fluorescence does Photosystem I exhibit?

<p>Constant fluorescence (C)</p> Signup and view all the answers

What is the function of chlorophyll fluorescence?

<p>It is an indicator of photosynthetic energy conversion (A)</p> Signup and view all the answers

Which process is NOT a way that excited chlorophyll dissipates the absorbed light energy?

<p>Through respiration (B)</p> Signup and view all the answers

What is the Kautsky effect related to?

<p>The rapid rise in fluorescence from Photosystem II (C)</p> Signup and view all the answers

What is the characteristic of the fluorescence from Photosystem I?

<p>It is constant (C)</p> Signup and view all the answers

What causes the increase in fluorescence in the Kautsky effect?

<p>Photosystem II (D)</p> Signup and view all the answers

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