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5 Written questions

5 Matching questions

  1. Chlorophyll a
  2. photosystem I
  3. spectrophotometer
  4. Cyclic electron flow
  5. Carbon fixation
  1. a One of two light-harvesting units of a chloroplast's thylakoid membrane; it uses the P700 reaction-center chlorophyll.
  2. b An instrument that measures the proportions of light of different wavelengths absorbed and transmitted by a pigment solution.
  3. c A photosynthetic pigment that participates directly in the light reactions, which convert solar energy to chemical energy.
  4. d A route of electron flow during the light reactions of photosynthesis that involves only photosystem I and that produces ATP but not NADPH or oxygen
  5. e the synthesis of organic compounds from carbon dioxide, such as in photosynthesis

5 Multiple choice questions

  1. almost identical to chlorophyll a, but slightly different absorption spectra, yellow-green
  2. A flattened membrane sac inside the chloroplast, used to convert light energy into chemical energy.
  3. process by which plants use the sun's energy to convert water and carbon dioxide into sugars
  4. One of two light-harvesting units of a chloroplast's thylakoid membrane; it uses the P680 reaction-center chlorophyll.
  5. plant capable of synthesizing its own food from simple organic substances

5 True/False questions

  1. C3 PlantA plant that uses the Calvin cycle for the initial steps that incorporate CO2 into organic material, forming a three-carbon compound as the first stable intermediate.


  2. visible lightThe distance between crests of electromagnetic waves.


  3. C4 Planttype of plant that minimizes photorespiration by fixing carbon twice, using a C4 pathway in addition to the Calvin-Benson Cycle.


  4. stromaThe fluid of the chloroplast surrounding the thylakoid membrane.


  5. photophosphorylationThe process of generating ATP from ADP and phosphate by means of a proton-motive force generated by the thylakoid membrane of the chloroplast during the light reactions of photosynthesis.