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7.1 Photosynthetic Organisms
  • Plants, algae, and cyanobacteria are photosynthetic organisms that produce most of the carbohydrate used as an energy source by the living world
  • In flowering plants, photosynthesis takes place within chloroplasts, organelles that contain membranous thylakoids surrounded by a fluid called stroma
  1. Photosynthesis in flowering plants occurs in which organelle?
    Answer
  2. Pigments, which absorb solar energy, are located in the ______________ membranes of a chloroplast.
    Answer
Essential Study Partner Summaries of major points:
  1. Organisms depend upon photosynthesis
Lab exercises
7.2 Plants as Solar Energy Converters
  • Plants make use of solar energy in the visible light range when they carry on photosynthesis
  • Photosynthesis has two sets of reactions: solar energy is captured by the pigments in thylakoids, and carbon dioxide is reduced by enzymes in the stroma.
  1. Give the function of pigments and list the three most commonly found in plants.
    Answer
  2. During photosynthesis, _______________ is reduced and _______________ is oxidized.
    Answer
  3. Where, specifically, do light reactions occur and, generally, what happens?
    Answer
  4. The Calvin cycle occurs in the ___________ where ______________ is reduced to carbohydrate
    Answer
  5. Where do the ATP required for the reduction of carbon dioxide come from?
    Answer
Essential Study Partner Summaries of major points:
  1. Solar radiation
  2. Key discoveries of photosynthetic process
  3. Structure of chloroplasts
  4. Function of chloroplasts
Labeling Exercises Art Quizzes
7.3 Light Reactions
  • Solar energy energizes electrons and permits a buildup of ATP and NADPH molecules.
  1. What does a photosystem consist of?
    Answer
  2. During the noncyclic electron pathway, what is the source of the oxygen released?
    Answer
  3. What molecule finally accepts the electrons that passed through the noncyclic electron pathway?
    Answer
  4. What molecules are produced by the cyclic electron pathway?
    Answer
  5. Where does the energy used in chemiosmosis come from and for what is it used?
    Answer
Essential Study Partner Summaries of major points:
  1. Light-dependent reactions
  2. Electron pathways
  3. ATP production
  4. The thylakoid membranes
Art Quizzes Animation Quizzes Study Guides
7.4 Calvin Cycle Reactions
  • Carbon dioxide reduction requires ATP and NADPH from the light reactions.
  1. The Calvin Cycle uses ______________ to produce _______________.
    Answer
  2. Does the Calvin Cycle use or produce ATP?
    Answer
Essential Study Partner Summaries of major points:
  1. Light-independent reactions
  2. The importance of PGAL
  3. The Calvin cycle
Art Quizzes Animation Quizzes
7.5 Other Types of Photosynthesis
  • Plants use C3, or C4, or CAM photosynthesis, which are distinguished by the manner in which CO2 is fixed.
  1. What is the cause of photorespriation in plants?
    Answer
  2. Which is more adapted to hot, dry climates, C3 or C4 plants and why?
    Answer
  3. What type of plants use CAM photosynthesis and in what sort of habitat are they found?
    Answer
Essential Study Partner Summaries of major points:
  1. Modes of photosynthesis
Art Quizzes





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