Photosynthesis and Solar Energy Conversion
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Questions and Answers

What is the main source of energy for Earth?

  • Wind energy
  • Geothermal energy
  • Solar energy (correct)
  • Nuclear energy
  • Which type of organisms sustain themselves without eating anything derived from other organisms?

  • Thiobacillus ferrooxidans
  • Photoautotrophs (correct)
  • Heterotrophs
  • Chemoautotrophs
  • What is the process wherein molecules are formed using energy from light?

  • Photosynthesis (correct)
  • Respiration
  • Chemosynthesis
  • Fermentation
  • Which type of organisms obtain organic material from other organisms?

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

    Which group of organisms are the consumers and decomposers of the biosphere?

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

    What generates the proton (H+) gradient in the linear flow of electrons?

    <p>Splitting of water by PS II</p> Signup and view all the answers

    In the cyclic flow of electrons, what happens when no NADP+ is returned from the Calvin cycle?

    <p>High energy electrons damage the cell</p> Signup and view all the answers

    Which process generates ATP and increases the potential energy of electrons in light reactions?

    <p>Splitting of water by PS II</p> Signup and view all the answers

    What is the role of ATP and NADPH in the Calvin Cycle?

    <p>Drive Sugar Synthesis</p> Signup and view all the answers

    What molecule enters the Calvin Cycle and leaves as glyceraldehyde-3-phospate (G3P)?

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

    Is the Calvin Cycle anabolic or catabolic?

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

    What is the main function of cyanobacteria?

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

    Which organisms are classified as photoautotrophs?

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

    What structures do cyanobacteria possess for photosynthesis?

    <p>Thylakoid membrane with phycobilisomes</p> Signup and view all the answers

    Where does photosynthesis occur in plants?

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

    What is the major site of conversion of light energy to chemical energy in eukaryotes?

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

    In chloroplasts, what forms another compartment within the thylakoids?

    <p>Thylakoid space</p> Signup and view all the answers

    What is the ratio of triose phosphate molecules that can be transferred out of the chloroplast to those that are produced?

    <p>1:6</p> Signup and view all the answers

    How many molecules of G3P are needed to produce three 5-carbon RuBP molecules in the Calvin cycle?

    <p>6</p> Signup and view all the answers

    In the Calvin cycle, how many G3P molecules are required for the net synthesis of 1 molecule of G3P?

    <p>3</p> Signup and view all the answers

    How many steps in the Calvin cycle are involved in the regeneration of RuBP?

    <p>12</p> Signup and view all the answers

    What molecule is required for the conversion of 5 remaining G3P molecules into three 5-carbon RuBP molecules?

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

    What is the most abundant protein on Earth?

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

    During Carbon Phosphate Reduction in the Calvin Cycle, what molecule is phosphorylated using ATP?

    <p>3-phosphoglycerate (3-PGA)</p> Signup and view all the answers

    How many molecules of G3P are formed after the reduction of 3-PGA in the Calvin Cycle?

    <p>2</p> Signup and view all the answers

    What happens when CO2 is added to ribulose 1,5-bisphosphate (RuBP) in the Calvin Cycle?

    <p>Formation of G3P</p> Signup and view all the answers

    Which enzyme catalyzes the step where CO2 is added to ribulose 1,5-bisphosphate (RuBP) in the Calvin Cycle?

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

    What is the product formed immediately after CO2 is added to ribulose 1,5-bisphosphate (RuBP)?

    <p>G3P</p> Signup and view all the answers

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