Explain the structure of cell organelle that performs the photosynthesis, with the help of a labelled diagram.

Explanation

1) In green plants there are special membrane bound organelles called chloroplasts.
2) Chloroplasts occur mainly in the mesophyll cells of leaves .
3) Typical chloroplasts are disc shaped and consist of three membranes.
4) The third layer that forms stacked sac-like structures is called grana. It is the site for trapping of solar energy.
5) Chloroplast is filled with a colourless area called stroma. Stacks of thylakoid membranes in stroma are connected by stroma Jamella.
6) Stroma is the site of dark reaction.
7) These chloroplasts are green in colour because of a pigment called chlorophyll.
8) The chlorophyll and other pigments of the chloroplasts are fat s oluble and are located in the liquid part of the thylakoid membrane .