What does the aqueous fluid between the chloroplast membrane and the grana known as?

What does the aqueous fluid between the chloroplast membrane and the grana known as?

  • Correct Answer: stroma
  • blood
  • plasma
  • water

Explanation: Both chloroplasts and photosynthetic bacteria contain grana, neat stacks of flattened sac-shaped membrane compartments called thylakoids . Thylakoids can be considered a sub-organelle within the chloroplast. Between the chloroplast membrane and the grana is an aqueous fluid known as stroma . Thylakoids, especially the thylakoid membrane, organize patterns of proteins and other molecules which conduct photosynthesis, as shown in Figure below . In addition to enzymes, two basic types of molecules - pigments and electron carriers – are significant in this process. You can take a video tour of a chloroplast at Encyclopedia Britannica: Chloroplast : http://www. britannica. com/EBchecked/media/16440/Chloroplasts-circulate-within-plant-cells .

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