Contained within the inner membrane of the chloroplast and surrounding the thylakoids is a gel-like substance called the stroma.
- The stroma refers to the colourless fluid surrounding the grana inside the chloroplast.
- Within the stroma are the grana, which contains the the thylakoid.
The stroma contains enzymes, sugars and organic acids.
- The stroma gel contains enzymes, sugars and organic acids.
- Carbohydrates that are produced by photosynthesis are not used straight away.
- They are stored as starch in the stroma