Product Synthesis

• T or F: 2 major end products are glucose and starch

  False
• T or F: synthesis of sucrose and starch are not part of the C3 cycle

  True
• A disaccharide of glucose and fructose

  Sucrose
• Main form of translocatable carbohydrate in plants

  Sucrose
• carbohydrate synthesized outside the chloroplast (in the cytosol)

  Sucrose
• A polysaccharide of glucose units

  starch
• Carbohydrate synthesized in the chloroplast stroma

  starch
• Usually built up during the day and used up as energy source at night

  transitory starch
• Can also be produced and stored in non-photosynthetic cells

  storage starch
• T or F: In starch synthesis Q enzymes catalyze formation of a–(1,6) links

  True
• T or F: starch synthase catalyzes formation of new a–(1,4) link, adding more glucose to the elongating chain

  True
• • Principal pathway provided by enzymes
  • Sucrose phosphate synthase
  • Sucrose phosphate phosphatase
  • Alternative pathway
  • Sucrose synthase
• T or F:

  UDPglucose + fructose <=> UDP + sucrose

  This reaction is spontaneous

  False
• T or F: Under normal conditions SS operates in the reverse direction to break down sucrose

  True
• T or F: Sucrose translocated from the leaf to storage organs and is most commonly stored as starch

  True
• T or F: ADPglucose is preferred for starch biosynthesis, thus UDPglucose -> ADPglucose

  True
• T or F: Resulting ADPglucose is converted to starch by Starch phosphatase

  False